diff --git a/libc/include/signal.h b/libc/include/signal.h
index cd11656..532e4a5 100644
--- a/libc/include/signal.h
+++ b/libc/include/signal.h
@@ -64,7 +64,7 @@
 
 int siginterrupt(int __signal, int __flag);
 
-#if __ANDROID_API__ >= __ANDROID_API_L__
+#if __ANDROID_API__ >= 21
 sighandler_t signal(int __signal, sighandler_t __handler) __INTRODUCED_IN(21);
 int sigaddset(sigset_t* __set, int __signal) __INTRODUCED_IN(21);
 int sigaddset64(sigset64_t* __set, int __signal) __INTRODUCED_IN(28);