diff --git a/stella/src/debugger/Debugger.cxx b/stella/src/debugger/Debugger.cxx
index f02131ebd..a22da4596 100644
--- a/stella/src/debugger/Debugger.cxx
+++ b/stella/src/debugger/Debugger.cxx
@@ -13,7 +13,7 @@
 // See the file "license" for information on usage and redistribution of
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //
-// $Id: Debugger.cxx,v 1.71 2005-07-20 04:28:13 urchlay Exp $
+// $Id: Debugger.cxx,v 1.72 2005-07-20 17:49:25 stephena Exp $
 //============================================================================
 
 #include "bspf.hxx"
@@ -198,7 +198,7 @@ string Debugger::loadListFile(string f) {
 				buffer[8] == ' '     &&
 				isxdigit(buffer[9])  &&
 				isxdigit(buffer[12]) &&
-				isblank(buffer[13]))
+				IS_BLANK(buffer[13]))
 		{
 			count++;
 			char addr[5];
diff --git a/stella/src/emucore/m6502/src/bspf/src/bspf.hxx b/stella/src/emucore/m6502/src/bspf/src/bspf.hxx
index 4a7756d72..17ca5229e 100644
--- a/stella/src/emucore/m6502/src/bspf/src/bspf.hxx
+++ b/stella/src/emucore/m6502/src/bspf/src/bspf.hxx
@@ -13,7 +13,7 @@
 // See the file "license" for information on usage and redistribution of
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //
-// $Id: bspf.hxx,v 1.7 2005-06-21 01:05:49 stephena Exp $
+// $Id: bspf.hxx,v 1.8 2005-07-20 17:49:26 stephena Exp $
 //============================================================================
 
 #ifndef BSPF_HXX
@@ -24,7 +24,7 @@
   that need to be defined for different operating systems.
 
   @author Bradford W. Mott
-  @version $Id: bspf.hxx,v 1.7 2005-06-21 01:05:49 stephena Exp $
+  @version $Id: bspf.hxx,v 1.8 2005-07-20 17:49:26 stephena Exp $
 */
 
 // Types for 8-bit signed and unsigned integers
@@ -69,9 +69,11 @@ typedef unsigned int uInt32;
 #ifdef BSPF_WIN32
   #define STR_CASE_CMP stricmp
   #define STR_N_CASE_CMP strnicmp
+  #define IS_BLANK(c) ((c == ' ') || (c == '\t'))
 #else
   #define STR_CASE_CMP strcasecmp
   #define STR_N_CASE_CMP strncasecmp
+  #define IS_BLANK(c) isblank(c)
 #endif
 
 #endif