diff --git a/contrib/gcc/config/freebsd.h b/contrib/gcc/config/freebsd.h
index e3aa4721287b..bddb78606090 100644
--- a/contrib/gcc/config/freebsd.h
+++ b/contrib/gcc/config/freebsd.h
@@ -61,8 +61,9 @@ Boston, MA 02111-1307, USA.  */
    || !strcmp (STR, "soname") || !strcmp (STR, "defsym") 		\
    || !strcmp (STR, "assert") || !strcmp (STR, "dynamic-linker"))
 
-
-#define CPP_FBSD_PREDEFINES "-Dunix -D__ELF__ -D__FreeBSD__=4 -D__FreeBSD_cc_version=400002 -Asystem(unix) -Asystem(FreeBSD)"
+/* Place spaces around this string.  We depend on string splicing to produce
+   the final CPP_PREDEFINES value.  */
+#define CPP_FBSD_PREDEFINES " -Dunix -D__ELF__ -D__FreeBSD__=4 -D__FreeBSD_cc_version=400002 -Asystem(unix) -Asystem(FreeBSD) "
 
 
 /* Code generation parameters.  */