diff --git a/configure b/configure
index c564dc1..e13c67c 100755
--- a/configure
+++ b/configure
@@ -6512,7 +6512,7 @@ else
 #include <stdlib.h>
 #include <readline/readline.h>
 
-main()
+int main()
 {
 	FILE *fp;
 	fp = fopen("conftest.rlv", "w");