diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 0e0f90e603b..182b72e2504 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -7690,7 +7690,8 @@ ValueType::MatchResult ValueType::matchParameter(const ValueType *call, const Va
     }
 
     if (call->typeScope != nullptr || func->typeScope != nullptr) {
-        if (call->typeScope != func->typeScope && !(call->typeScope->definedType && call->typeScope->definedType->isDerivedFrom(func->typeScope->className)))
+        if (call->typeScope != func->typeScope &&
+          !(call->typeScope && func->typeScope && call->typeScope->definedType && call->typeScope->definedType->isDerivedFrom(func->typeScope->className)))
             return ValueType::MatchResult::NOMATCH;
     }