diff --git a/shadow.c b/shadow.c
index cc3c896..b16dc04 100644
--- a/shadow.c
+++ b/shadow.c
@@ -591,16 +591,18 @@ static char *get_full_path(const char *filename TSRMLS_DC)
 static inline char *instance_to_template(const char *instname, int len TSRMLS_DC)
 {
 	char *newname = NULL;
-	if (is_subdir_of(ZSTR_VAL(SHADOW_G(template)), ZSTR_LEN(SHADOW_G(template)), instname, len)) {
-		newname = estrndup(instname, len);
-	} else if (is_subdir_of(ZSTR_VAL(SHADOW_G(instance)), ZSTR_LEN(SHADOW_G(instance)), instname, len)) {
-		spprintf(
-			&newname,
-			MAXPATHLEN,
-			"%s/%s",
-			ZSTR_VAL(SHADOW_G(template)),
-			instname + ZSTR_LEN(SHADOW_G(instance)) + 1
-		);
+	if (SHADOW_ENABLED()) {
+		if (is_subdir_of(ZSTR_VAL(SHADOW_G(template)), ZSTR_LEN(SHADOW_G(template)), instname, len)) {
+			newname = estrndup(instname, len);
+		} else if (is_subdir_of(ZSTR_VAL(SHADOW_G(instance)), ZSTR_LEN(SHADOW_G(instance)), instname, len)) {
+			spprintf(
+				&newname,
+				MAXPATHLEN,
+				"%s/%s",
+				ZSTR_VAL(SHADOW_G(template)),
+				instname + ZSTR_LEN(SHADOW_G(instance)) + 1
+			);
+		}
 	}
 	return newname;
 }
@@ -764,7 +766,7 @@ zend_string *shadow_resolve_path(const char *filename, int filename_len)
         result = original_zend_resolve_path(filename, filename_len);
     }
     if (SHADOW_G(debug) & SHADOW_DEBUG_RESOLVE) {
-		fprintf(stderr, "Resolve: %s -> %s\n", filename, ZSTR_VAL(result));
+		fprintf(stderr, "Resolve: %s -> %s\n", filename, result ? ZSTR_VAL(result) : NULL);
     }
     return result;
 }
diff --git a/tests/mkdir3.phpt b/tests/mkdir3.phpt
new file mode 100644
index 0000000..159baf9
--- /dev/null
+++ b/tests/mkdir3.phpt
@@ -0,0 +1,17 @@
+--TEST--
+Check creating directories when shadow is not enabled
+--SKIPIF--
+<?php if (!extension_loaded('shadow')) {
+    print 'skip';
+} ?>
+--FILE--
+<?php
+$instance = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'instance';
+mkdir("$instance/cache/upgrades");
+
+echo "Created\n";
+
+rmdir("$instance/cache/upgrades");
+?>
+--EXPECT--
+Created