diff --git a/sys/cddl/dev/fbt/powerpc/fbt_isa.c b/sys/cddl/dev/fbt/powerpc/fbt_isa.c
index a3af6b4f707a..0e131bf629e9 100644
--- a/sys/cddl/dev/fbt/powerpc/fbt_isa.c
+++ b/sys/cddl/dev/fbt/powerpc/fbt_isa.c
@@ -48,7 +48,7 @@
 
 #define	FBT_ENTRY	"entry"
 #define	FBT_RETURN	"return"
-#define FBT_AFRAMES	7
+#define	FBT_AFRAMES	7
 
 int
 fbt_invop(uintptr_t addr, uintptr_t *stack, uintptr_t rval)