diff --git a/lldb/source/Plugins/Process/Utility/InstructionUtils.h b/lldb/source/Plugins/Process/Utility/InstructionUtils.h
index 813990095c49..6226fbc04b08 100644
--- a/lldb/source/Plugins/Process/Utility/InstructionUtils.h
+++ b/lldb/source/Plugins/Process/Utility/InstructionUtils.h
@@ -20,7 +20,7 @@ static inline uint64_t
 Bits64 (const uint64_t bits, const uint32_t msbit, const uint32_t lsbit)
 {
     assert(msbit < 64 && lsbit <= msbit);
-    return (bits >> lsbit) & ((1u << (msbit - lsbit + 1)) - 1);
+    return (bits >> lsbit) & ((1ull << (msbit - lsbit + 1)) - 1);
 }
 
 // Return the bit field(s) from the most significant bit (msbit) to the