diff --git a/src/tint/sem/bool_type.cc b/src/tint/sem/bool_type.cc
index c8027a4f8c..d42f687cb4 100644
--- a/src/tint/sem/bool_type.cc
+++ b/src/tint/sem/bool_type.cc
@@ -28,7 +28,7 @@ Bool::Bool(Bool&&) = default;
 Bool::~Bool() = default;
 
 size_t Bool::Hash() const {
-  return TypeInfo::Of<Bool>().full_hashcode;
+  return static_cast<size_t>(TypeInfo::Of<Bool>().full_hashcode);
 }
 
 bool Bool::Equals(const Type& other) const {
diff --git a/src/tint/sem/external_texture_type.cc b/src/tint/sem/external_texture_type.cc
index 1abe82567f..885bbae872 100644
--- a/src/tint/sem/external_texture_type.cc
+++ b/src/tint/sem/external_texture_type.cc
@@ -28,7 +28,7 @@ ExternalTexture::ExternalTexture(ExternalTexture&&) = default;
 ExternalTexture::~ExternalTexture() = default;
 
 size_t ExternalTexture::Hash() const {
-  return TypeInfo::Of<ExternalTexture>().full_hashcode;
+  return static_cast<size_t>(TypeInfo::Of<ExternalTexture>().full_hashcode);
 }
 
 bool ExternalTexture::Equals(const sem::Type& other) const {
diff --git a/src/tint/sem/f32_type.cc b/src/tint/sem/f32_type.cc
index 62b964d769..2e666d55b2 100644
--- a/src/tint/sem/f32_type.cc
+++ b/src/tint/sem/f32_type.cc
@@ -28,7 +28,7 @@ F32::F32(F32&&) = default;
 F32::~F32() = default;
 
 size_t F32::Hash() const {
-  return TypeInfo::Of<F32>().full_hashcode;
+  return static_cast<size_t>(TypeInfo::Of<F32>().full_hashcode);
 }
 
 bool F32::Equals(const Type& other) const {
diff --git a/src/tint/sem/i32_type.cc b/src/tint/sem/i32_type.cc
index 4631513462..47cd5a6cf3 100644
--- a/src/tint/sem/i32_type.cc
+++ b/src/tint/sem/i32_type.cc
@@ -28,7 +28,7 @@ I32::I32(I32&&) = default;
 I32::~I32() = default;
 
 size_t I32::Hash() const {
-  return TypeInfo::Of<I32>().full_hashcode;
+  return static_cast<size_t>(TypeInfo::Of<I32>().full_hashcode);
 }
 
 bool I32::Equals(const Type& other) const {
diff --git a/src/tint/sem/u32_type.cc b/src/tint/sem/u32_type.cc
index 60bff9de5b..15801488b2 100644
--- a/src/tint/sem/u32_type.cc
+++ b/src/tint/sem/u32_type.cc
@@ -28,7 +28,7 @@ U32::~U32() = default;
 U32::U32(U32&&) = default;
 
 size_t U32::Hash() const {
-  return TypeInfo::Of<U32>().full_hashcode;
+  return static_cast<size_t>(TypeInfo::Of<U32>().full_hashcode);
 }
 
 bool U32::Equals(const Type& other) const {
diff --git a/src/tint/sem/void_type.cc b/src/tint/sem/void_type.cc
index ff7e79e58e..e366e81203 100644
--- a/src/tint/sem/void_type.cc
+++ b/src/tint/sem/void_type.cc
@@ -28,7 +28,7 @@ Void::Void(Void&&) = default;
 Void::~Void() = default;
 
 size_t Void::Hash() const {
-  return TypeInfo::Of<Void>().full_hashcode;
+  return static_cast<size_t>(TypeInfo::Of<Void>().full_hashcode);
 }
 
 bool Void::Equals(const Type& other) const {