diff --git a/src/battery/linux.c b/src/battery/linux.c
index f36096b..54af607 100644
--- a/src/battery/linux.c
+++ b/src/battery/linux.c
@@ -17,7 +17,7 @@
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 **************************************************************************/
 
-#ifdef __linux
+#ifdef __linux__
 
 #include <stdlib.h>