diff --git a/magick/PreRvIcccm.c b/magick/PreRvIcccm.c
index 2b0a2b5..5f714cc 100644
--- a/magick/PreRvIcccm.c
+++ b/magick/PreRvIcccm.c
@@ -156,7 +156,7 @@
return((XWMHints *) AcquireAlignedMemory(1,sizeof(XWMHints)));
}
-Status XGetGCValues(Display *display,GC gc,unsigned long mask,
+Status XGetGCValues(Display *display,GC gc,size_t mask,
XGCValues *values)
{
return(MagickTrue);
@@ -181,7 +181,7 @@
actual_format,
status;
- unsigned long
+ size_t
leftover,
number_items;
@@ -276,7 +276,7 @@
protocol;
number_bytes=0;
- for (i=0; i < (long) argc; i++)
+ for (i=0; i < (ssize_t) argc; i++)
number_bytes+=(unsigned int) ((argv[i] ? strlen(argv[i]) : 0)+1);
protocol.encoding=XA_STRING;
protocol.format=8;
@@ -301,7 +301,7 @@
if (buffer == (char *) NULL)
return(MagickFalse);
protocol.value=(unsigned char *) buffer;
- for (i=0; i < (long) argc; i++)
+ for (i=0; i < (ssize_t) argc; i++)
{
char
*argument;