diff --git a/grp/initgroups.c b/grp/initgroups.c
index f056fbf5aa..93e7f5814d 100644
--- a/grp/initgroups.c
+++ b/grp/initgroups.c
@@ -128,7 +128,7 @@ internal_getgrouplist (const char *user, gid_t group, long int *size,
 
       /* This is really only for debugging.  */
       if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_RETURN)
-	__libc_fatal ("illegal status in internal_getgrouplist");
+	__libc_fatal ("Illegal status in internal_getgrouplist.\n");
 
       /* For compatibility reason we will continue to look for more
 	 entries using the next service even though data has already
diff --git a/nptl/pthread_cond_wait.c b/nptl/pthread_cond_wait.c
index 3e11054182..ebf07ca82d 100644
--- a/nptl/pthread_cond_wait.c
+++ b/nptl/pthread_cond_wait.c
@@ -516,7 +516,7 @@ __pthread_cond_wait_common (pthread_cond_t *cond, pthread_mutex_t *mutex,
 		  struct timespec rt;
 		  if (__clock_gettime (CLOCK_MONOTONIC, &rt) != 0)
 		    __libc_fatal ("clock_gettime does not support "
-				  "CLOCK_MONOTONIC");
+				  "CLOCK_MONOTONIC\n");
 		  /* Convert the absolute timeout value to a relative
 		     timeout.  */
 		  rt.tv_sec = abstime->tv_sec - rt.tv_sec;
diff --git a/nscd/initgrcache.c b/nscd/initgrcache.c
index 2c74951f57..4764f14a45 100644
--- a/nscd/initgrcache.c
+++ b/nscd/initgrcache.c
@@ -159,7 +159,7 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req,
 
       /* This is really only for debugging.  */
       if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_RETURN)
-	__libc_fatal ("illegal status in internal_getgrouplist");
+	__libc_fatal ("Illegal status in internal_getgrouplist.\n");
 
       any_success |= status == NSS_STATUS_SUCCESS;
 
diff --git a/nss/nsswitch.c b/nss/nsswitch.c
index ee46f24424..3c48b4b85e 100644
--- a/nss/nsswitch.c
+++ b/nss/nsswitch.c
@@ -235,7 +235,7 @@ __nss_next2 (service_user **ni, const char *fct_name, const char *fct2_name,
       /* This is really only for debugging.  */
       if (__builtin_expect (NSS_STATUS_TRYAGAIN > status
 			    || status > NSS_STATUS_RETURN, 0))
-	 __libc_fatal ("illegal status in __nss_next");
+	 __libc_fatal ("Illegal status in __nss_next.\n");
 
        if (nss_next_action (*ni, status) == NSS_ACTION_RETURN)
 	 return 1;
diff --git a/sysdeps/aarch64/dl-irel.h b/sysdeps/aarch64/dl-irel.h
index 5889ee187b..bef71ed0f3 100644
--- a/sysdeps/aarch64/dl-irel.h
+++ b/sysdeps/aarch64/dl-irel.h
@@ -47,7 +47,7 @@ elf_irela (const ElfW(Rela) *reloc)
       *reloc_addr = value;
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif
diff --git a/sysdeps/arm/dl-irel.h b/sysdeps/arm/dl-irel.h
index a7b6456075..be6eb7743e 100644
--- a/sysdeps/arm/dl-irel.h
+++ b/sysdeps/arm/dl-irel.h
@@ -46,7 +46,7 @@ elf_irel (const Elf32_Rel *reloc)
       *reloc_addr = value;
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/generic/unwind-dw2.c b/sysdeps/generic/unwind-dw2.c
index 082609b34a..724c16a7f0 100644
--- a/sysdeps/generic/unwind-dw2.c
+++ b/sysdeps/generic/unwind-dw2.c
@@ -843,7 +843,7 @@ execute_cfa_program (const unsigned char *insn_ptr,
 	    struct frame_state_reg_info *old_rs = fs->regs.prev;
 #ifdef _LIBC
 	    if (old_rs == NULL)
-	      __libc_fatal ("invalid DWARF unwind data");
+	      __libc_fatal ("Invalid DWARF unwind data.\n");
 	    else
 #endif
 	      {
diff --git a/sysdeps/i386/dl-irel.h b/sysdeps/i386/dl-irel.h
index 55303180c7..bcaf0668ac 100644
--- a/sysdeps/i386/dl-irel.h
+++ b/sysdeps/i386/dl-irel.h
@@ -45,7 +45,7 @@ elf_irel (const Elf32_Rel *reloc)
       *reloc_addr = value;
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/nptl/futex-internal.h b/sysdeps/nptl/futex-internal.h
index 1a5624789d..6fd27f0df6 100644
--- a/sysdeps/nptl/futex-internal.h
+++ b/sysdeps/nptl/futex-internal.h
@@ -197,7 +197,7 @@ futex_wake (unsigned int* futex_word, int processes_to_wake, int private);
 static __always_inline __attribute__ ((__noreturn__)) void
 futex_fatal_error (void)
 {
-  __libc_fatal ("The futex facility returned an unexpected error code.");
+  __libc_fatal ("The futex facility returned an unexpected error code.\n");
 }
 
 #endif  /* futex-internal.h */
diff --git a/sysdeps/powerpc/powerpc32/dl-irel.h b/sysdeps/powerpc/powerpc32/dl-irel.h
index a7368b2582..61d0e4cf61 100644
--- a/sysdeps/powerpc/powerpc32/dl-irel.h
+++ b/sysdeps/powerpc/powerpc32/dl-irel.h
@@ -46,7 +46,7 @@ elf_irela (const Elf32_Rela *reloc)
       *reloc_addr = value;
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/powerpc/powerpc64/dl-irel.h b/sysdeps/powerpc/powerpc64/dl-irel.h
index ab13c04358..2fd0ee8a86 100644
--- a/sysdeps/powerpc/powerpc64/dl-irel.h
+++ b/sysdeps/powerpc/powerpc64/dl-irel.h
@@ -57,7 +57,7 @@ elf_irela (const Elf64_Rela *reloc)
 #endif
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/s390/dl-irel.h b/sysdeps/s390/dl-irel.h
index d8ba7ba427..ecb24f0a9b 100644
--- a/sysdeps/s390/dl-irel.h
+++ b/sysdeps/s390/dl-irel.h
@@ -46,7 +46,7 @@ elf_irela (const ElfW(Rela) *reloc)
       *reloc_addr = value;
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/sparc/sparc32/dl-irel.h b/sysdeps/sparc/sparc32/dl-irel.h
index ffca36864f..cf47cda834 100644
--- a/sysdeps/sparc/sparc32/dl-irel.h
+++ b/sysdeps/sparc/sparc32/dl-irel.h
@@ -56,7 +56,7 @@ elf_irela (const Elf32_Rela *reloc)
   else if (r_type == R_SPARC_NONE)
     ;
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/sparc/sparc64/dl-irel.h b/sysdeps/sparc/sparc64/dl-irel.h
index c5cd3057ac..446fed1836 100644
--- a/sysdeps/sparc/sparc64/dl-irel.h
+++ b/sysdeps/sparc/sparc64/dl-irel.h
@@ -59,7 +59,7 @@ elf_irela (const Elf64_Rela *reloc)
   else if (r_type == R_SPARC_NONE)
     ;
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */
diff --git a/sysdeps/unix/sysv/linux/netlink_assert_response.c b/sysdeps/unix/sysv/linux/netlink_assert_response.c
index f31ccb52ff..6afc3a17ce 100644
--- a/sysdeps/unix/sysv/linux/netlink_assert_response.c
+++ b/sysdeps/unix/sysv/linux/netlink_assert_response.c
@@ -72,12 +72,12 @@ __netlink_assert_response (int fd, ssize_t result)
           char message[200];
           if (family < 0)
             __snprintf (message, sizeof (message),
-                        "Unexpected error %d on netlink descriptor %d",
+                        "Unexpected error %d on netlink descriptor %d.\n",
                         error_code, fd);
           else
             __snprintf (message, sizeof (message),
                         "Unexpected error %d on netlink descriptor %d"
-                        " (address family %d)",
+                        " (address family %d).\n",
                         error_code, fd, family);
           __libc_fatal (message);
         }
diff --git a/sysdeps/x86_64/dl-irel.h b/sysdeps/x86_64/dl-irel.h
index 6ecc50fb42..33f100d8b1 100644
--- a/sysdeps/x86_64/dl-irel.h
+++ b/sysdeps/x86_64/dl-irel.h
@@ -45,7 +45,7 @@ elf_irela (const ElfW(Rela) *reloc)
       *reloc_addr = value;
     }
   else
-    __libc_fatal ("unexpected reloc type in static binary");
+    __libc_fatal ("Unexpected reloc type in static binary.\n");
 }
 
 #endif /* dl-irel.h */