diff --git a/lldb/source/Utility/Scalar.cpp b/lldb/source/Utility/Scalar.cpp
--- a/lldb/source/Utility/Scalar.cpp
+++ b/lldb/source/Utility/Scalar.cpp
@@ -331,7 +331,7 @@
 
 Scalar &Scalar::operator=(long long v) {
   m_type = e_slonglong;
-  m_integer = llvm::APInt(sizeof(long) * 8, v, true);
+  m_integer = llvm::APInt(sizeof(long long) * 8, v, true);
   return *this;
 }