diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index b687c9f77a4..fec7a06d612 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -138,8 +138,13 @@ const Token* SymbolDatabase::isEnumDefinition(const Token* tok)
     if (tok->str() == "{")
         return tok;
     tok = tok->next(); // skip ':'
-    while (Token::Match(tok, "%name%|::"))
+    bool hasType = false;
+    while (Token::Match(tok, "%name%|::")) {
+        hasType = true;
         tok = tok->next();
+    }
+    if (!hasType)
+        throw InternalError(tok, "SymbolDatabase bailout; invalid enum", InternalError::SYNTAX);
     return Token::simpleMatch(tok, "{") ? tok : nullptr;
 }
 
diff --git a/test/cli/fuzz-crash/crash-def181ea7bf444e7a9d0f85b3ad264c31a0b90e4 b/test/cli/fuzz-crash/crash-def181ea7bf444e7a9d0f85b3ad264c31a0b90e4
new file mode 100644
index 00000000000..3b609c62362
--- /dev/null
+++ b/test/cli/fuzz-crash/crash-def181ea7bf444e7a9d0f85b3ad264c31a0b90e4
@@ -0,0 +1 @@
+enum
f:{};