Index: lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
===================================================================
--- lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
+++ lib/StaticAnalyzer/Checkers/CheckSecuritySyntaxOnly.cpp
@@ -514,7 +514,7 @@
              *Source = CE->getArg(1)->IgnoreImpCasts();
   if (const auto *DeclRef = dyn_cast<DeclRefExpr>(Target))
     if (const auto *Array = dyn_cast<ConstantArrayType>(DeclRef->getType())) {
-      uint64_t ArraySize = BR.getContext().getTypeSize(Array) / 8;
+      auto ArraySize = BR.getContext().getTypeSizeInChars(Array).getQuantity();
       if (const auto *String = dyn_cast<StringLiteral>(Source)) {
         if (ArraySize >= String->getLength() + 1)
           return;