diff --git a/src/common/util/thread.h b/src/common/util/thread.h
index 3497b89..6655429 100644
--- a/src/common/util/thread.h
+++ b/src/common/util/thread.h
@@ -11,11 +11,19 @@ typedef union {
 
 typedef union {
 	uint32_t value;
-	void *pointer;  // Bits outside of .value may be reset
+	void *_pointer;  // Bits outside of .value may be reset
 } ThreadResult;
 
 #define THREAD_NONE (Thread) { .handle = 0, }
 
+HEADER_FN ThreadResult
+thread_wrap_result(uint32_t value)
+{
+	ThreadResult res = { ._pointer = NULL };
+	res.value = value;
+	return res;
+}
+
 typedef CLOSURE_T(ThreadResult) ThreadEntry;
 
 /**
diff --git a/src/common/util/thread.posix.c b/src/common/util/thread.posix.c
index 249da04..69d2322 100644
--- a/src/common/util/thread.posix.c
+++ b/src/common/util/thread.posix.c
@@ -53,13 +53,13 @@ run_entry(void *arg)
 	assert(arg != NULL);
 	NativeEntryArg casted_arg = *(NativeEntryArg*) arg;
 	ThreadEntry entry = casted_arg.entry;
-	void *error_result = casted_arg.error_result.pointer;
+	void *error_result = casted_arg.error_result._pointer;
 	free(arg);
 	if (!entry.callback) {
 		return error_result;
 	}
 	ThreadResult result = entry.callback(entry.env);
-	return result.pointer;
+	return result._pointer;
 }
 
 Thread
@@ -106,7 +106,7 @@ thread_join(Thread th, ThreadResult *result_ptr)
 	pthread_t handle = get_handle(th);
 	void **retval = NULL;
 	if (result_ptr) {
-		retval = &result_ptr->pointer;
+		retval = &result_ptr->_pointer;
 	}
 	int error = pthread_join(handle, retval);
 	if (error) {
@@ -119,7 +119,7 @@ thread_join(Thread th, ThreadResult *result_ptr)
 void
 thread_exit(ThreadResult result)
 {
-	pthread_exit(result.pointer);
+	pthread_exit(result._pointer);
 }
 
 bool
diff --git a/src/common/util/thread.std.c b/src/common/util/thread.std.c
index 1198611..46dfaa4 100644
--- a/src/common/util/thread.std.c
+++ b/src/common/util/thread.std.c
@@ -111,7 +111,7 @@ thread_join(Thread th, ThreadResult *result_ptr)
 	thrd_t handle = get_handle(th);
 	int32_t *retval = NULL;
 	if (result_ptr) {
-		result_ptr->pointer = NULL;
+		*result_ptr = thread_wrap_result(0);
 		retval = (int32_t*) &result_ptr->value;
 	}
 	int error = thrd_join(handle, retval);