diff --git a/x86_64/aes-encrypt-internal.asm b/x86_64/aes-encrypt-internal.asm
index 8a70e0e51efe8ef5aa6d907576d7aea6de0ad460..e89dc2bac2d1c2bddfc3ba63eb9dd22635541a25 100644
--- a/x86_64/aes-encrypt-internal.asm
+++ b/x86_64/aes-encrypt-internal.asm
@@ -119,16 +119,16 @@ PROLOGUE(_nettle_aes_encrypt)
 
 	AES_ROUND(TABLE, SA,SB,SC,SD, TA, TMP)
 	xorl	(KEY), TA
-	
+
 	AES_ROUND(TABLE, SB,SC,SD,SA, TB, TMP)
 	xorl	4(KEY),TB
-	
+
 	AES_ROUND(TABLE, SC,SD,SA,SB, TC, TMP)
 	xorl	8(KEY),TC
-	
+
 	AES_ROUND(TABLE, SD,SA,SB,SC, TD, TMP)
 	xorl	12(KEY),TD
-	
+
 	AES_FINAL_ROUND(TA,TB,TC,TD, TABLE, SA, TMP)
 	AES_FINAL_ROUND(TB,TC,TD,TA, TABLE, SB, TMP)
 	AES_FINAL_ROUND(TC,TD,TA,TB, TABLE, SC, TMP)