diff --git a/src/getRevision.sh b/src/getRevision.sh
index 4a5df925..dfc4a344 100755
--- a/src/getRevision.sh
+++ b/src/getRevision.sh
@@ -1,5 +1,12 @@
 SCRIPT_DIRECTORY=`dirname $0`
 rev=\"`git rev-parse --short HEAD`\"
+lastrev=$(head -n 1 $SCRIPT_DIRECTORY/Revision.h | awk -F'PLUGIN_REVISION ' {'print $2'})
+
 echo current revision $rev
-echo "#define PLUGIN_REVISION $rev" > $SCRIPT_DIRECTORY/Revision.h
-echo "#define PLUGIN_REVISION_W L$rev" >> $SCRIPT_DIRECTORY/Revision.h
+echo last build revision $lastrev
+
+if [ "$lastrev" != "$rev" ]
+then
+   echo "#define PLUGIN_REVISION $rev" > $SCRIPT_DIRECTORY/Revision.h
+   echo "#define PLUGIN_REVISION_W L$rev" >> $SCRIPT_DIRECTORY/Revision.h
+fi