diff --git a/gcc/config/host-darwin.c b/gcc/config/host-darwin.c
index 1816c619511..b101fca5c96 100644
--- a/gcc/config/host-darwin.c
+++ b/gcc/config/host-darwin.c
@@ -61,7 +61,8 @@ darwin_gt_pch_use_address (void *addr, size_t sz, int fd, size_t off)
   sz = (sz + pagesize - 1) / pagesize * pagesize;
 
   if (munmap (pch_address_space + sz, sizeof (pch_address_space) - sz) != 0)
-    fatal_error (input_location, "couldn%'t unmap pch_address_space: %m");
+    fatal_error (input_location,
+		 "could not unmap %<pch_address_space%> %m");
 
   if (ret)
     {