diff --git a/src/common/util/thread.h b/src/common/util/thread.h
index 7cc1977..3497b89 100644
--- a/src/common/util/thread.h
+++ b/src/common/util/thread.h
@@ -10,8 +10,8 @@ typedef union {
 } Thread;
 
 typedef union {
-	uintptr_t value;
-	void *pointer;
+	uint32_t value;
+	void *pointer;  // Bits outside of .value may be reset
 } ThreadResult;
 
 #define THREAD_NONE (Thread) { .handle = 0, }