diff --git a/configure b/configure
index 86edb7cae1..498a46d3d3 100755
--- a/configure
+++ b/configure
@@ -18362,6 +18362,10 @@ else
                 va_end(ap2);
                 va_end(ap1);
             }
+            int main()
+            {
+                return foo("hi", 17);
+            }
 _ACEOF
 rm -f conftest.$ac_objext conftest$ac_exeext
 if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
diff --git a/configure.in b/configure.in
index 8883bbb10e..788a8dd10b 100644
--- a/configure.in
+++ b/configure.in
@@ -1737,6 +1737,10 @@ AC_CACHE_CHECK([for va_copy],
                 va_copy(ap2, ap1);
                 va_end(ap2);
                 va_end(ap1);
+            }
+            int main()
+            {
+                return foo("hi", 17);
             }],
             wx_cv_func_va_copy=yes,
             wx_cv_func_va_copy=no