diff --git a/crossbar.h b/crossbar.h
index 6711da2..de5cb98 100644
--- a/crossbar.h
+++ b/crossbar.h
@@ -251,7 +251,9 @@ typedef enum {
 
 #define PINMODE_NONE     (0)
 #define PINMODE_OUTPUT   (1U<<1)
+#ifndef __LPC17XX__
 #define PINMODE_OD       (1U<<2)
+#endif
 #define PINMODE_PULLUP   (PullMode_Up<<3)
 #define PINMODE_PULLDOWN (PullMode_Down<<3)
 #define PINMODE_REMAP    (1U<<10)