diff --git a/oscar64/Declaration.cpp b/oscar64/Declaration.cpp
index cfb7b11..883c19d 100644
--- a/oscar64/Declaration.cpp
+++ b/oscar64/Declaration.cpp
@@ -1167,7 +1167,7 @@ Expression* Expression::ConstantFold(Errors * errors, LinkerSection * dataSectio
 		return ex;
 	}
 	else if (mType == EX_BINARY && mToken == TK_ADD && mLeft->mType == EX_VARIABLE && mLeft->mDecValue->mType == DT_VARIABLE && (mLeft->mDecValue->mFlags & DTF_CONST) && 
-		mLeft->mDecValue && mRight->mDecValue && mLeft->mDecValue->mValue->mType == EX_CONSTANT &&
+		mLeft->mDecValue && mRight->mDecValue && mLeft->mDecValue->mValue && mLeft->mDecValue->mValue->mType == EX_CONSTANT &&
 		mLeft->mDecType->mType == DT_TYPE_POINTER && mRight->mType == EX_CONSTANT && mRight->mDecValue->mType == DT_CONST_INTEGER)
 	{
 		mLeft = mLeft->mDecValue->mValue;