diff --git a/build/macosx/dist.sh b/build/macosx/dist.sh
index 4d8702023..9c07688c0 100755
--- a/build/macosx/dist.sh
+++ b/build/macosx/dist.sh
@@ -3,14 +3,23 @@
 
 if test -f /sw/bin/head
 then
-  # a more useful version of head than what's included with osx
+  # old 4 char version.. osx only uses the two chars
   #REVISION=`head -c 4 ../../todo.txt`
+  # a more useful version of head than what's included with osx
   REVISION=`head -c 4 ../../todo.txt | tail -c 2`
 else
   # can't get four bytes of head (osx doesn't support -c)
   REVISION=0000
 fi
 
+VERSIONED=`cat ../../app/PdeBase.java | grep 00$REVISION`
+if [ -z "$VERSIONED" ]
+then
+  echo Fix the revision number in PdeBase.java
+  exit
+fi
+
+
 ./make.sh
 
 echo Creating P5 distribution for revision $REVISION...
diff --git a/build/macosx/run.sh b/build/macosx/run.sh
index a91428694..b6cf03f15 100755
--- a/build/macosx/run.sh
+++ b/build/macosx/run.sh
@@ -14,5 +14,5 @@ CLASSPATH=/System/Library/Java/Extensions/QTJava.zip:lib:lib/build:lib/pde.jar:l
 
 export CLASSPATH
 
-#cd work && java PdeBase
 cd work && /System/Library/Frameworks/JavaVM.framework/Versions/1.3.1/Commands/java PdeBase
+#cd work && java PdeBase