diff --git a/include/sys/ddt.h b/include/sys/ddt.h
index fc40a495a..fb1445d8d 100644
--- a/include/sys/ddt.h
+++ b/include/sys/ddt.h
@@ -95,7 +95,7 @@ typedef struct ddt_key {
 #define	DDT_KEY_WORDS	(sizeof (ddt_key_t) / sizeof (uint64_t))
 
 #define	DDE_GET_NDVAS(dde) (DDK_GET_CRYPT(&dde->dde_key) \
-	? SPA_DVAS_PER_BP : SPA_DVAS_PER_BP - 1)
+	? SPA_DVAS_PER_BP - 1 : SPA_DVAS_PER_BP)
 
 typedef struct ddt_phys {
 	dva_t		ddp_dva[SPA_DVAS_PER_BP];