1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index e804bfc90e..d4302f44c8 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -2515,7 +2515,7 @@ IdentifierInfo *PCHReader::DecodeIdentifierInfo(unsigned ID) {
     // All of the strings in the PCH file are preceded by a 16-bit
     // length. Extract that 16-bit length to avoid having to execute
     // strlen().
-    const char *StrLenPtr = Str - 2;
+    const unsigned char *StrLenPtr = (const unsigned char*) Str - 2;
     unsigned StrLen = (((unsigned) StrLenPtr[0])
                        | (((unsigned) StrLenPtr[1]) << 8)) - 1;
     IdentifiersLoaded[ID - 1]