diff --git a/gpgme/src/ath.c b/gpgme/src/ath.c
index e5b9964..9ec61a0 100644
--- a/gpgme/src/ath.c
+++ b/gpgme/src/ath.c
@@ -61,7 +61,7 @@ ath_self (void)
   return (uintptr_t) GetCurrentThreadId ();
 }
 #else
-# ifdef __linux
+# ifdef __gnu_linux__
 #include <sys/syscall.h>
 uintptr_t
 ath_self (void)