diff --git a/llvm/lib/MC/MachObjectWriter.cpp b/llvm/lib/MC/MachObjectWriter.cpp
index de5349459d1c..bd294c27e8a7 100644
--- a/llvm/lib/MC/MachObjectWriter.cpp
+++ b/llvm/lib/MC/MachObjectWriter.cpp
@@ -826,7 +826,7 @@ public:
     // relocation entry in the the low 16 bits of r_address field.
     unsigned ThumbBit = 0;
     unsigned MovtBit = 0;
-    switch (Fixup.getKind()) {
+    switch ((unsigned)Fixup.getKind()) {
     default: break;
     case ARM::fixup_arm_movt_hi16:
     case ARM::fixup_arm_movt_hi16_pcrel: