diff --git a/bcache.h b/bcache.h
index 6aef9c4..50dd2b5 100644
--- a/bcache.h
+++ b/bcache.h
@@ -200,9 +200,9 @@
 #define BCH_FEATURE_INCOMPAT	2
 #define BCH_FEATURE_TYPE_MASK	0x03
 
-#define BCH_FEATURE_COMPAT_SUUP		0
-#define BCH_FEATURE_INCOMPAT_SUUP	0
-#define BCH_FEATURE_RO_COMPAT_SUUP	0
+#define BCH_FEATURE_COMPAT_SUPP		0
+#define BCH_FEATURE_INCOMPAT_SUPP	0
+#define BCH_FEATURE_RO_COMPAT_SUPP	0
 
 #define BCH_HAS_COMPAT_FEATURE(sb, mask) \
 		((sb)->feature_compat & (mask))