diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index d0c4022..333907c 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -2949,7 +2949,7 @@
   }
 
   default:
-    llvm_unreachable("unexpected size for EncodeNEONModImm");
+    llvm_unreachable("unexpected size for isNEONModifiedImm");
     return SDValue();
   }