diff --git a/include/libopencm3/cm3/fpb.h b/include/libopencm3/cm3/fpb.h
index 31d006e4..80812eec 100644
--- a/include/libopencm3/cm3/fpb.h
+++ b/include/libopencm3/cm3/fpb.h
@@ -33,7 +33,7 @@
 #define FPB_REMAP		MMIO32(FPB_BASE + 4)
 
 /* Flash Patch Comparator (FPB_COMPx) */
-#define FPB_COMP		(voltile u32 *)(FPB_BASE + 8)
+#define FPB_COMP		(volatile u32 *)(FPB_BASE + 8)
 
 /* TODO: PID, CID */