diff --git a/libraries/Wire/Wire.h b/libraries/Wire/Wire.h
index 5d6b36457e..bcdbb1214e 100644
--- a/libraries/Wire/Wire.h
+++ b/libraries/Wire/Wire.h
@@ -29,7 +29,11 @@
 
 
 
+#ifndef I2C_BUFFER_LENGTH
 #define BUFFER_LENGTH 128
+#else
+#define BUFFER_LENGTH I2C_BUFFER_LENGTH
+#endif
 
 class TwoWire : public Stream
 {