diff --git a/i3bar/include/util.h b/i3bar/include/util.h
index eb05ed08..262d7750 100644
--- a/i3bar/include/util.h
+++ b/i3bar/include/util.h
@@ -51,6 +51,11 @@
     } \
 } while(0)
 
+/* We will include libi3.h which define its own version of ELOG.
+ * We want *our* version, so we undef the libi3 one. */
+#if defined(ELOG)
+#undef ELOG
+#endif
 #define ELOG(fmt, ...) do { \
     fprintf(stderr, "[%s:%d] ERROR: " fmt, __FILE__, __LINE__, ##__VA_ARGS__); \
 } while(0)