diff --git a/lib/checkuninitvar.cpp b/lib/checkuninitvar.cpp
index bfcc2ee5b..8d8381918 100644
--- a/lib/checkuninitvar.cpp
+++ b/lib/checkuninitvar.cpp
@@ -1099,7 +1099,7 @@ void CheckUninitVar::checkScope(const Scope* scope)
     if (scope->function) {
         for (unsigned int i = 0; i < scope->function->argCount(); i++) {
             const Variable *arg = scope->function->getArgumentVar(i);
-            if (arg && Token::Match(arg->typeStartToken(), "struct| %type% * %var% [,)]")) {
+            if (arg && arg->declarationId() && Token::Match(arg->typeStartToken(), "struct| %type% * %var% [,)]")) {
                 // Treat the pointer as initialized until it is assigned by malloc
                 for (const Token *tok = scope->classStart; tok != scope->classEnd; tok = tok->next()) {
                     if (Token::Match(tok, "[;{}] %varid% = %var% (", arg->declarationId()) &&
diff --git a/test/testuninitvar.cpp b/test/testuninitvar.cpp
index 4378cdb8b..cb43ab3dc 100644
--- a/test/testuninitvar.cpp
+++ b/test/testuninitvar.cpp
@@ -3285,6 +3285,12 @@ private:
                         "    struct AB *ab = malloc(sizeof(struct AB));\n"
                         "    do_something(ab);\n"
                         "}");
+        ASSERT_EQUALS("", errout.str());
+
+		// analysis failed. varid 0.
+        checkUninitVar2("void *vlc_custom_create (vlc_object_t *parent, size_t length, const char *typename) {\n"
+                        "  assert (length >= sizeof (vlc_object_t));\n"
+                        "}\n");
         ASSERT_EQUALS("", errout.str());
     }