diff --git a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
index 74f5d847627709..ad303d7a2240fd 100644
--- a/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp
@@ -3323,7 +3323,7 @@ void FunctionStackPoisoner::processStaticAllocas() {
 
   // Minimal header size (left redzone) is 4 pointers,
   // i.e. 32 bytes on 64-bit platforms and 16 bytes in 32-bit platforms.
-  size_t Granularity = 1ULL << Mapping.Scale;
+  uint64_t Granularity = 1ULL << Mapping.Scale;
   size_t MinHeaderSize = std::max((size_t)ASan.LongSize / 2, Granularity);
   const ASanStackFrameLayout &L =
       ComputeASanStackFrameLayout(SVD, Granularity, MinHeaderSize);
diff --git a/llvm/lib/Transforms/Utils/ASanStackFrameLayout.cpp b/llvm/lib/Transforms/Utils/ASanStackFrameLayout.cpp
index 01912297324a9d..c5f3c683458a46 100644
--- a/llvm/lib/Transforms/Utils/ASanStackFrameLayout.cpp
+++ b/llvm/lib/Transforms/Utils/ASanStackFrameLayout.cpp
@@ -33,7 +33,7 @@ static inline bool CompareVars(const ASanStackVariableDescription &a,
 
 // We also force minimal alignment for all vars to kMinAlignment so that vars
 // with e.g. alignment 1 and alignment 16 do not get reordered by CompareVars.
-static const size_t kMinAlignment = 16;
+static const uint64_t kMinAlignment = 16;
 
 // We want to add a full redzone after every variable.
 // The larger the variable Size the larger is the redzone.
@@ -52,7 +52,7 @@ static size_t VarAndRedzoneSize(size_t Size, size_t Granularity,
 
 ASanStackFrameLayout
 ComputeASanStackFrameLayout(SmallVectorImpl<ASanStackVariableDescription> &Vars,
-                            size_t Granularity, size_t MinHeaderSize) {
+                            uint64_t Granularity, size_t MinHeaderSize) {
   assert(Granularity >= 8 && Granularity <= 64 &&
          (Granularity & (Granularity - 1)) == 0);
   assert(MinHeaderSize >= 16 && (MinHeaderSize & (MinHeaderSize - 1)) == 0 &&