diff --git a/coders/png.c b/coders/png.c
index c108f94..883f70d 100644
--- a/coders/png.c
+++ b/coders/png.c
@@ -9896,7 +9896,7 @@
 
                if (ping_exclude_iCCP == MagickFalse)
                  {
-                       png_set_iCCP(ping,ping_info,(const png_charp) name,0,
+                       png_set_iCCP(ping,ping_info,(png_charp) name,0,
 #if (PNG_LIBPNG_VER < 10500)
                          (png_charp) GetStringInfoDatum(profile),
 #else