diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index 9eed214..66eee99 100644
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -75,7 +75,7 @@
 }
 
 
-void APInt::initSlowCase(unsigned numBits, uint64_t val, bool isSigned) {
+void APInt::initSlowCase(uint64_t val, bool isSigned) {
   pVal = getClearedMemory(getNumWords());
   pVal[0] = val;
   if (isSigned && int64_t(val) < 0)