diff --git a/IDEHelper/Compiler/BfModuleTypeUtils.cpp b/IDEHelper/Compiler/BfModuleTypeUtils.cpp
index b9c986d2..f13a3290 100644
--- a/IDEHelper/Compiler/BfModuleTypeUtils.cpp
+++ b/IDEHelper/Compiler/BfModuleTypeUtils.cpp
@@ -8891,7 +8891,8 @@ BfGenericParamInstance* BfModule::GetGenericTypeParamInstance(int genericParamId
 	if (genericTypeInst->mGenericTypeInfo->mGenericExtensionInfo != NULL)
 	{
 		auto activeTypeDef = GetActiveTypeDef(NULL, true);
-		if ((activeTypeDef->mTypeDeclaration != genericTypeInst->mTypeDef->mTypeDeclaration) && (activeTypeDef->IsExtension()))
+		if ((activeTypeDef->mTypeDeclaration != genericTypeInst->mTypeDef->mTypeDeclaration) && (activeTypeDef->IsExtension()) &&
+			(genericTypeInst->mTypeDef->ContainsPartial(activeTypeDef)))
 		{
 			BfTypeDef* lookupTypeDef = activeTypeDef;
 			while (lookupTypeDef->mNestDepth > genericTypeInst->mTypeDef->mNestDepth)
diff --git a/IDEHelper/Compiler/BfSystem.cpp b/IDEHelper/Compiler/BfSystem.cpp
index b5bb427f..fd041a0d 100644
--- a/IDEHelper/Compiler/BfSystem.cpp
+++ b/IDEHelper/Compiler/BfSystem.cpp
@@ -986,6 +986,15 @@ void BfTypeDef::ReportMemory(MemReporter* memReporter)
 	memReporter->AddVec(mDirectAllocNodes, false);
 }
 
+bool BfTypeDef::ContainsPartial(BfTypeDef* partialTypeDef)
+{
+	if (partialTypeDef->mPartialIdx < 0)
+		return false;
+	if (partialTypeDef->mPartialIdx >= mPartials.mSize)
+		return false;
+	return mPartials[partialTypeDef->mPartialIdx] == partialTypeDef;
+}
+
 bool BfTypeDef::NameEquals(BfTypeDef* otherTypeDef)
 {
  	if (mName != otherTypeDef->mName)
diff --git a/IDEHelper/Compiler/BfSystem.h b/IDEHelper/Compiler/BfSystem.h
index ba2a8246..d38d0932 100644
--- a/IDEHelper/Compiler/BfSystem.h
+++ b/IDEHelper/Compiler/BfSystem.h
@@ -1211,6 +1211,7 @@ public:
 	BfMethodDef* GetMethodByName(const StringImpl& name, int paramCount = -1);
 	BfFieldDef* GetFieldByName(const StringImpl& name);
 	bool HasAutoProperty(BfPropertyDeclaration* propertyDeclaration);	
+	bool ContainsPartial(BfTypeDef* partialTypeDef);
 	String GetAutoPropertyName(BfPropertyDeclaration* propertyDeclaration);
 	BfAstNode* GetRefNode();