diff --git a/kernel/include/sortix/kernel/decl.h b/kernel/include/sortix/kernel/decl.h
index bd0f325d..04872d1b 100644
--- a/kernel/include/sortix/kernel/decl.h
+++ b/kernel/include/sortix/kernel/decl.h
@@ -30,8 +30,8 @@
 
 typedef uintptr_t addr_t;
 
-#define likely(x) __builtin_expect((x),1)
-#define unlikely(x) __builtin_expect((x),0)
+#define likely(x) __builtin_expect(!!(x),1)
+#define unlikely(x) __builtin_expect(!!(x),0)
 
 #if !defined(CPU) && defined(__i386__)
 	#define CPU X86