diff --git a/src/syslogd.h b/src/syslogd.h
index 98de174..217eb84 100644
--- a/src/syslogd.h
+++ b/src/syslogd.h
@@ -50,7 +50,7 @@
 /*
  * Linux uses EIO instead of EBADFD (mrn 12 May 96)
  */
-#ifdef linux
+#ifdef __linux__
 #define EHANGUP EIO
 #else
 #define EHANGUP EBADFD