diff --git a/orbis-kernel/src/sys/sys_sce.cpp b/orbis-kernel/src/sys/sys_sce.cpp
index 2fd747032..740dc295f 100644
--- a/orbis-kernel/src/sys/sys_sce.cpp
+++ b/orbis-kernel/src/sys/sys_sce.cpp
@@ -271,7 +271,7 @@ orbis::SysResult orbis::sys_evf_cancel(Thread *thread, sint id, uint64_t value,
 
   auto numWaitThreads = evf->cancel(value);
   if (pNumWaitThreads != nullptr) {
-    *pNumWaitThreads = numWaitThreads;
+    return uwrite(pNumWaitThreads, static_cast<sint>(numWaitThreads));
   }
   return {};
 }