diff --git a/sys/crypto/aesni/aesni.c b/sys/crypto/aesni/aesni.c
--- a/sys/crypto/aesni/aesni.c
+++ b/sys/crypto/aesni/aesni.c
@@ -610,7 +610,7 @@
 			return (error);
 	}
 
-	kt = is_fpu_kern_thread(0) || (csp->csp_cipher_alg == 0);
+	kt = is_fpu_kern_thread(0);
 	if (!kt) {
 		ACQUIRE_CTX(ctxidx, ctx);
 		fpu_kern_enter(curthread, ctx,