diff --git a/ref/blake2xb-ref.c b/ref/blake2xb-ref.c
index 1811ab2..276983b 100644
--- a/ref/blake2xb-ref.c
+++ b/ref/blake2xb-ref.c
@@ -181,8 +181,8 @@ int main( void )
     buf[i] = ( uint8_t )i;
   }
 
-  /* Testing length of ouputs rather than inputs */
-  /* (Test of input lengths mostly covered by blake2s tests) */
+  /* Testing length of outputs rather than inputs */
+  /* (Test of input lengths mostly covered by blake2b tests) */
 
   /* Test simple API */
   for( outlen = 1; outlen <= BLAKE2_KAT_LENGTH; ++outlen )
diff --git a/ref/blake2xs-ref.c b/ref/blake2xs-ref.c
index de420fa..5ad11a0 100644
--- a/ref/blake2xs-ref.c
+++ b/ref/blake2xs-ref.c
@@ -179,7 +179,7 @@ int main( void )
     buf[i] = ( uint8_t )i;
   }
 
-  /* Testing length of ouputs rather than inputs */
+  /* Testing length of outputs rather than inputs */
   /* (Test of input lengths mostly covered by blake2s tests) */
 
   /* Test simple API */