1 files changed, 3 insertions, 0 deletions
diff --git a/README b/README
index 769dc318eb..3361c1f99b 100644
--- a/README
+++ b/README
@@ -62,6 +62,9 @@ Copying exsistent target(macway) is easy way.
      keymaps[]
 6. Build.
 
+If you have a build error like following, comment out "--relax" option in Makefile.common.
+    (.vectors+0x30): relocation truncated to fit: R_AVR_13_PCREL against symbol `__vector_12'
+
 
 Build Options
 -------------