diff --git a/module/icp/algs/modes/gcm.c b/module/icp/algs/modes/gcm.c
index 0a14be5a7..953afd885 100644
--- a/module/icp/algs/modes/gcm.c
+++ b/module/icp/algs/modes/gcm.c
@@ -1427,7 +1427,6 @@ gcm_init_avx(gcm_ctx_t *ctx, const uint8_t *iv, size_t iv_len,
 	    B_FALSE);
 
 	/* Init H (encrypt zero block) and create the initial counter block. */
-	memset(ctx->gcm_ghash, 0, sizeof (ctx->gcm_ghash));
 	memset(H, 0, sizeof (ctx->gcm_H));
 	kfpu_begin();
 	aes_encrypt_intel(keysched, aes_rounds,
@@ -1456,6 +1455,8 @@ gcm_init_avx(gcm_ctx_t *ctx, const uint8_t *iv, size_t iv_len,
 		kfpu_begin();
 	}
 
+	memset(ctx->gcm_ghash, 0, sizeof (ctx->gcm_ghash));
+
 	/* Openssl post increments the counter, adjust for that. */
 	gcm_incr_counter_block(ctx);