diff --git a/src/vrend_strbuf.h b/src/vrend_strbuf.h
index 26296fa..6fd4e92 100644
--- a/src/vrend_strbuf.h
+++ b/src/vrend_strbuf.h
@@ -215,7 +215,8 @@ static inline void strarray_dump_with_line_numbers(struct vrend_strarray *sa)
          } else {
             len = strlen(line);
          }
-         vrend_printf("%4d: %.*s\n", lineno++, len, line);
+         if (len)
+            vrend_printf("%4d: %.*s\n", lineno++, len, line);
       } while (end);
    }
 }