diff --git a/ChangeLog b/ChangeLog
index 616858f..ba9739e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-04-28 Riccardo Mottola <rm@gnu.org>
+
+	* Framework/PCFileManager.m:
+	Correct cast according to ctypes caveats.
+
 2011-04-07 Riccardo Mottola <rm@gnu.org>
 
 	* Headers/ProjectCenter/PCDefines.h
diff --git a/Framework/PCFileManager.m b/Framework/PCFileManager.m
index 61f0169..e9324f5 100644
--- a/Framework/PCFileManager.m
+++ b/Framework/PCFileManager.m
@@ -1,7 +1,7 @@
 /*
    GNUstep ProjectCenter - http://www.gnustep.org/experience/ProjectCenter.html
 
-   Copyright (C) 2000-2010 Free Software Foundation
+   Copyright (C) 2000-2011 Free Software Foundation
 
    Authors: Philippe C.D. Robert
             Serg Stoyan
@@ -627,7 +627,7 @@ static PCFileManager *_mgr = nil;
   buf = [data bytes];
   for (i = printable = 0, n = [data length]; i < n; i++)
     {
-      if (isprint(buf[i]) || isspace(buf[i]))
+      if (isprint((int)(unsigned char)buf[i]) || isspace((int)(unsigned char)buf[i]))
 	{
 	  printable++;
 	}