diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
index eb9b376b4f62e..fa104e4f69d7f 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -2698,7 +2698,7 @@ bool llvm::isIntS34Immediate(SDNode *N, int64_t &Imm) {
   if (!isa<ConstantSDNode>(N))
     return false;
 
-  Imm = (int64_t)cast<ConstantSDNode>(N)->getSExtValue();
+  Imm = cast<ConstantSDNode>(N)->getSExtValue();
   return isInt<34>(Imm);
 }
 bool llvm::isIntS34Immediate(SDValue Op, int64_t &Imm) {