diff --git a/libc/src/unistd.cpp b/libc/src/unistd.cpp
index 5c80ae87..210da314 100644
--- a/libc/src/unistd.cpp
+++ b/libc/src/unistd.cpp
@@ -476,6 +476,6 @@ extern "C"
             errno = (int)-rc;
             return 0;
         }
-        return rc;
+        return (int)rc;
     }
 }