diff --git a/BUILD.gn b/BUILD.gn
index d96d624..567fd74 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -244,6 +244,9 @@ if (defined(ohos_lite)) {
       "-DMKSH_UNLIMITED",
       "-DMKSH_BUILD_R=593",
     ]
+
+    defines = [ "MKSH_OH_ADAPT" ]
+
     ldflags = [
       "-pie",
       "-Wl,-z,relro",
diff --git a/exec.c b/exec.c
index 3d35db5..06a0048 100644
--- a/exec.c
+++ b/exec.c
@@ -1167,6 +1167,12 @@ builtin(const char *name, int (*func) (const char **))
 struct tbl *
 findcom(const char *name, int flags)
 {
+#ifdef MKSH_OH_ADAPT
+	// fix crash for 'exec -a0'
+	if (name == NULL) {
+		return NULL;
+	}
+#endif
 	static struct tbl temp;
 	uint32_t h = hash(name);
 	struct tbl *tp = NULL, *tbi;