diff --git a/src/config.c b/src/config.c
index dac7488..da69933 100644
--- a/src/config.c
+++ b/src/config.c
@@ -1349,7 +1349,8 @@ configure_filemap(char *options)
 		return (KORE_RESULT_ERROR);
 	}
 
-	if (!kore_filemap_create(current_domain, argv[1], argv[0], argv[2])) {
+	if (kore_filemap_create(current_domain,
+	    argv[1], argv[0], argv[2]) == NULL) {
 		kore_log(LOG_ERR, "cannot create filemap for %s", argv[1]);
 		return (KORE_RESULT_ERROR);
 	}
diff --git a/tools/kore-serve/src/kore-serve.c b/tools/kore-serve/src/kore-serve.c
index cb57638..2203e65 100644
--- a/tools/kore-serve/src/kore-serve.c
+++ b/tools/kore-serve/src/kore-serve.c
@@ -90,6 +90,6 @@ kore_parent_configure(int argc, char *argv[])
 	dom = kore_domain_new("*");
 	kore_domain_attach(dom, srv);
 
-	if (!kore_filemap_create(dom, rpath, "/", NULL))
+	if (kore_filemap_create(dom, rpath, "/", NULL) == NULL)
 		fatal("failed to create filemap for %s", rpath);
 }