diff --git a/coders/tim.c b/coders/tim.c
index d68a947..bd265c3 100644
--- a/coders/tim.c
+++ b/coders/tim.c
@@ -256,7 +256,7 @@
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
- if (q == (const Quantum *) NULL)
+ if (q == (Quantum *) NULL)
break;
p=tim_pixels+y*bytes_per_line;
for (x=0; x < ((ssize_t) image->columns-1); x+=2)
@@ -293,7 +293,7 @@
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
- if (q == (const Quantum *) NULL)
+ if (q == (Quantum *) NULL)
break;
p=tim_pixels+y*bytes_per_line;
for (x=0; x < (ssize_t) image->columns; x++)
@@ -322,7 +322,7 @@
{
p=tim_pixels+y*bytes_per_line;
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++)
{
@@ -357,7 +357,7 @@
{
p=tim_pixels+y*bytes_per_line;
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++)
{
