diff --git a/configure b/configure
index c65b5f6a55..309aeac815 100755
--- a/configure
+++ b/configure
@@ -2084,7 +2084,7 @@ if test "$cap" != "no" ; then
   cat > $TMPC <<EOF
 #include <stdio.h>
 #include <sys/capability.h>
-int main(void) { cap_t caps; caps = cap_init(); }
+int main(void) { cap_t caps; caps = cap_init(); return caps != NULL; }
 EOF
   if compile_prog "" "-lcap" ; then
     cap=yes