diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2b45485607a0..3e609a37c235 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2004-12-04  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	PR bootstrap/18804
+	* mklibgcc.in (vis_hide): Use implementation instead of declaration
+	for test function.
+
 2004-12-04  Richard Henderson  <rth@redhat.com>
 
 	* config/alpha/alpha.c (alpha_expand_unaligned_load): Don't forget to
diff --git a/gcc/mklibgcc.in b/gcc/mklibgcc.in
index 9729f2b41d10..535420b91017 100644
--- a/gcc/mklibgcc.in
+++ b/gcc/mklibgcc.in
@@ -99,7 +99,7 @@ if [ "$SHLIB_LINK" ]; then
   # overriding that with #pragmas.  The dance with @ is to prevent
   # echo from seeing anything it might take for an option.
   echo "vis_hide := \$(strip \$(subst @,-,\\"
-  echo "    \$(shell if echo 'void foo(void);' | \\"
+  echo "    \$(shell if echo 'void foo(void) {}' | \\"
   echo "          $gcc_compile -fvisibility=hidden -Werror \\"
   echo "          -c -xc - -o /dev/null 2> /dev/null; \\"
   echo "          then echo @fvisibility=hidden @DHIDE_EXPORTS; \\"