diff --git a/libselinux/src/procattr.c b/libselinux/src/procattr.c
index 7efcd7e1..8cd59af5 100644
--- a/libselinux/src/procattr.c
+++ b/libselinux/src/procattr.c
@@ -22,7 +22,7 @@ static pthread_key_t destructor_key;
 static int destructor_key_initialized = 0;
 static __thread char destructor_initialized;
 
-#ifndef ANDROID
+#ifndef __ANDROID__
 /* Android declares this in unistd.h and has a definition for it */
 static pid_t gettid(void)
 {