diff --git a/src/xstd.h b/src/xstd.h
index 95744dd..fa6c35b 100644
--- a/src/xstd.h
+++ b/src/xstd.h
@@ -55,7 +55,7 @@
 #endif  /* defined(BOOKMARKFS_DEBUG) */
 
 #define log_printf(f, ...)  \
-    fprintf(stderr, "%s: " f "\n", FILE_NAME_, __VA_ARGS__)
+    fprintf(stderr, "%s:%d: " f "\n", FILE_NAME_, __LINE__, __VA_ARGS__)
 #define log_puts(s)  log_printf("%s", s)
 
 #ifdef BOOKMARKFS_DEBUG