diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp
index 3d2b354b0b3..7a4df2bd351 100644
--- a/lib/Target/Alpha/AlphaRegisterInfo.cpp
+++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp
@@ -31,8 +31,8 @@
 using namespace llvm;
 
 //These describe LDAx
-static const int64_t IMM_LOW  = 0xffffffffffff8000;
-static const int IMM_HIGH = 0x0000000000007fff;
+static const int64_t IMM_LOW  = 0xffffffffffff8000LL;
+static const int IMM_HIGH = 0x0000000000007fffLL;
 static const int IMM_MULT = 65536;
 
 static long getUpper16(long l)