diff --git a/sigrok.h b/sigrok.h
index 89878561..d0c6529a 100644
--- a/sigrok.h
+++ b/sigrok.h
@@ -68,12 +68,12 @@ extern "C" {
 #define SR_HZ_TO_NS(n) (1000000000 / (n))
 
 /* libsigrok loglevels. */
-#define SR_LOG_NONE	0
-#define SR_LOG_ERR	1
-#define SR_LOG_WARN	2
-#define SR_LOG_INFO	3
-#define SR_LOG_DBG	4
-#define SR_LOG_SPEW	5
+#define SR_LOG_NONE	 0
+#define SR_LOG_ERR	 1
+#define SR_LOG_WARN	 2
+#define SR_LOG_INFO	 3
+#define SR_LOG_DBG	 4
+#define SR_LOG_SPEW	 5
 
 typedef int (*sr_receive_data_callback) (int fd, int revents, void *user_data);