1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 6d075d28479..f14b2167791 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3336,7 +3336,7 @@ if test "$posix_threads" = "yes"; then
       void *foo(void *parm) {
         return NULL;
       }
-      main() {
+      int main() {
         pthread_attr_t attr;
         pthread_t id;
         if (pthread_attr_init(&attr)) return (-1);