diff --git a/coders/dps.c b/coders/dps.c
index 22dfcff..94c866e 100644
--- a/coders/dps.c
+++ b/coders/dps.c
@@ -374,7 +374,7 @@
         for (y=0; y < (ssize_t) image->rows; y++)
         {
           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
-          if (q == (const Quantum *) NULL)
+          if (q == (Quantum *) NULL)
             break;
           for (x=0; x < (ssize_t) image->columns; x++)
           {
@@ -396,7 +396,7 @@
         for (y=0; y < (ssize_t) image->rows; y++)
         {
           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
-          if (q == (const Quantum *) NULL)
+          if (q == (Quantum *) NULL)
             break;
           for (x=0; x < (ssize_t) image->columns; x++)
           {
@@ -447,7 +447,7 @@
       for (y=0; y < (ssize_t) image->rows; y++)
       {
         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
-        if (q == (const Quantum *) NULL)
+        if (q == (Quantum *) NULL)
           break;
         for (x=0; x < (ssize_t) image->columns; x++)
         {
@@ -494,7 +494,7 @@
               for (y=0; y < (ssize_t) image->rows; y++)
               {
                 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
-                if (q == (const Quantum *) NULL)
+                if (q == (Quantum *) NULL)
                   break;
                 for (x=0; x < (ssize_t) image->columns; x++)
                 {