diff --git a/src/alloy/backend/ivm/ivm_assembler.cc b/src/alloy/backend/ivm/ivm_assembler.cc
index bfd7600a7..a95237f2e 100644
--- a/src/alloy/backend/ivm/ivm_assembler.cc
+++ b/src/alloy/backend/ivm/ivm_assembler.cc
@@ -81,7 +81,7 @@ int IVMAssembler::Assemble(
     size_t type_size = GetTypeSize(slot->type);
     // Align to natural size.
     stack_offset = XEALIGN(stack_offset, type_size);
-    slot->set_constant(stack_offset);
+    slot->set_constant((uint32_t)stack_offset);
     stack_offset += type_size;
   }
   // Ensure 16b alignment.
diff --git a/src/alloy/backend/x64/lowering/tracers.h b/src/alloy/backend/x64/lowering/tracers.h
index e0536c7c5..7201b4f25 100644
--- a/src/alloy/backend/x64/lowering/tracers.h
+++ b/src/alloy/backend/x64/lowering/tracers.h
@@ -11,7 +11,22 @@
 #define ALLOY_BACKEND_X64_X64_LOWERING_TRACERS_H_
 
 #include <alloy/core.h>
+
+#if XE_LIKE_WIN32
 #include <xmmintrin.h>
+#else
+typedef union __declspec(align(16)) __m128 {
+	float m128_f32[4];
+	uint64_t m128_u64[2];
+	int8_t m128_i8[16];
+	int16_t m128_i16[8];
+	int32_t m128_i32[4];
+	int64_t m128_i64[2];
+	uint8_t m128_u8[16];
+	uint16_t m128_u16[8];
+	uint32_t m128_u32[4];
+} __m128;
+#endif
 
 
 namespace alloy {
diff --git a/src/alloy/backend/x64/x64_emitter.cc b/src/alloy/backend/x64/x64_emitter.cc
index 3a9e6d142..80ed2cbca 100644
--- a/src/alloy/backend/x64/x64_emitter.cc
+++ b/src/alloy/backend/x64/x64_emitter.cc
@@ -117,7 +117,7 @@ int X64Emitter::Emit(HIRBuilder* builder, size_t& out_stack_size) {
     size_t type_size = GetTypeSize(slot->type);
     // Align to natural size.
     stack_offset = XEALIGN(stack_offset, type_size);
-    slot->set_constant(stack_offset);
+    slot->set_constant((uint32_t)stack_offset);
     stack_offset += type_size;
   }
   // Ensure 16b alignment.