diff --git a/IDEHelper/Compiler/BfModuleTypeUtils.cpp b/IDEHelper/Compiler/BfModuleTypeUtils.cpp
index 11bb4acb..56e35a2c 100644
--- a/IDEHelper/Compiler/BfModuleTypeUtils.cpp
+++ b/IDEHelper/Compiler/BfModuleTypeUtils.cpp
@@ -2452,6 +2452,9 @@ void BfModule::ExecuteCEOnCompile(CeEmitContext* ceEmitContext, BfTypeInstance*
 			if (!typeInstance->IsTypeMemberIncluded(methodDef->mDeclaringType, mCurTypeInstance->mTypeDef, this))
 				continue;
 			
+			if (methodDef->mIdx >= typeInstance->mMethodInstanceGroups.mSize)
+				continue;
+
 			auto& methodInstanceGroup = typeInstance->mMethodInstanceGroups[methodDef->mIdx];
 			if (methodInstanceGroup.mDefaultCustomAttributes == NULL)
 			{