diff --git a/MagickCore/cipher.c b/MagickCore/cipher.c
index 8fcdc9b..0c6daa4 100644
--- a/MagickCore/cipher.c
+++ b/MagickCore/cipher.c
@@ -651,7 +651,7 @@
       *restrict q;
 
     q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
-    if (q == (const Quantum *) NULL)
+    if (q == (Quantum *) NULL)
       break;
     length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type,
       pixels,exception);
@@ -857,7 +857,7 @@
       *restrict q;
 
     q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
-    if (q == (const Quantum *) NULL)
+    if (q == (Quantum *) NULL)
       break;
     length=ExportQuantumPixels(image,image_view,quantum_info,quantum_type,
       pixels,exception);