diff --git a/win32/compile.sh b/win32/compile.sh
index 2ab52d697..36866e0f9 100644
--- a/win32/compile.sh
+++ b/win32/compile.sh
@@ -11,9 +11,11 @@ else
 fi
 
 echo "Building installer ... "
-result=`/C/Program\ Files\ \(x86\)/Inno\ Setup\ 6/ISCC tuxpaint-${arch}.iss | grep installer.exe`
+result=`/C/Program\ Files\ \(x86\)/Inno\ Setup\ 6/ISCC -DBuildTarget=${arch} tuxpaint.iss | grep installer.exe`
 if [ "x$result" != "x" ]; then
   installer=`basename $result`
+else
+  exit
 fi
 
 echo "Building portable zip archive ... "
diff --git a/win32/tuxpaint.iss b/win32/tuxpaint.iss
index 9075d378b..7584f4714 100644
--- a/win32/tuxpaint.iss
+++ b/win32/tuxpaint.iss
@@ -6,8 +6,7 @@
 ;
 ; Should we change this to Tux4Kids? -bjk 2011.06.15
 
-; Fixme: /D option for iscc.exe seems to work only on windows command prompt.
-; You should manually edit the following lines to specify the build target
+; Edit the following lines or use -D (or /D) option for iscc.exe to specify the build target.
 #ifndef BuildTarget
 ;#define BuildTarget   "i686"
 #define BuildTarget   "x86_64"