diff --git a/configure.ac b/configure.ac
index 1ddc3d6010..020a0e08ce 100755
--- a/configure.ac
+++ b/configure.ac
@@ -2633,7 +2633,7 @@ dnl **********************************************************************
 dnl Check for the CA bundle
 dnl **********************************************************************
 
-if test "$check_for_ca_bundle" -gt 0; then
+if test -n "$check_for_ca_bundle"; then
   CURL_CHECK_CA_BUNDLE
 fi