diff --git a/fstrim.c b/fstrim.c
index 73705f9..2bd0577 100644
--- a/fstrim.c
+++ b/fstrim.c
@@ -116,7 +116,7 @@
     /* Release the wakelock that let us work */
     release_wake_lock(FSTRIM_WAKELOCK);
 
-    return (void *)ret;
+    return (void *)(uintptr_t)ret;
 }
 
 int fstrim_filesystems(void)