diff --git a/config9.m4 b/config9.m4
index ce63132..24d0fd0 100644
--- a/config9.m4
+++ b/config9.m4
@@ -273,9 +273,12 @@ dnl ----
                        PHP_ADD_INCLUDE($CURL_DIR/include)
                        PHP_ADD_LIBRARY_WITH_PATH(curl, $CURL_DIR/$PHP_LIBDIR, HTTP_SHARED_LIBADD)
                        PHP_EVAL_LIBLINE(`$CURL_CONFIG --libs`, HTTP_SHARED_LIBADD)
-                       if test "x$CURL_SSL" != "x"; then
+                       case "$CURL_SSL"
+                       in
+                       crypto|gcrypt)
                                PHP_ADD_LIBRARY_WITH_PATH([$CURL_SSL], $CURL_DIR/$PHP_LIBDIR, PHP_HTTP_SHARED_LIBADD)
-                       fi
+                               ;;
+                       esac
                        AC_DEFINE([PHP_HTTP_HAVE_CURL], [1], [Have libcurl support])
                        HTTP_HAVE_A_REQUEST_LIB=true
                fi