diff --git a/src/gos/gos_linux.c b/src/gos/gos_linux.c
index f7ac1f78..13cbede9 100644
--- a/src/gos/gos_linux.c
+++ b/src/gos/gos_linux.c
@@ -169,7 +169,7 @@ gThreadreturn gfxThreadWait(gThread thread) {
 
 		res = 0;
 		sem_getvalue(&pSem->sem, &res);
-		if (res < pSem->max)
+		if (res < (int)pSem->max)
 			sem_post(&pSem->sem);
 	}
 #else