diff --git a/IDEHelper/Compiler/BfContext.cpp b/IDEHelper/Compiler/BfContext.cpp
index 0fa84845..61affda7 100644
--- a/IDEHelper/Compiler/BfContext.cpp
+++ b/IDEHelper/Compiler/BfContext.cpp
@@ -878,7 +878,7 @@ void BfContext::RebuildType(BfType* type, bool deleteOnDemandTypes, bool rebuild
 	if (type->IsConstExprValue())
 	{
 		auto constExprType = (BfConstExprValueType*)type;
-		if (constExprType->mType->mSize != mScratchModule->GetPrimitiveType(constExprType->mValue.mTypeCode)->mSize)
+		if ((constExprType->mValue.mTypeCode != BfTypeCode_StringId) && (constExprType->mType->mSize != mScratchModule->GetPrimitiveType(constExprType->mValue.mTypeCode)->mSize))
 			wantDeleteType = true;
 	}
 	if (wantDeleteType)