diff --git a/bin/update_pch b/bin/update_pch
index 6641f1584055..9b541d8a87a9 100755
--- a/bin/update_pch
+++ b/bin/update_pch
@@ -1107,7 +1107,8 @@ def main():
                         return 0
 
     # Didn't update.
-    return 1
+    # Use exit code 2 to distinguish it from exit code 1 used e.g. when an exception occurs.
+    return 2
 
 if __name__ == '__main__':
     """ Process all the includes in a Module
diff --git a/bin/update_pch.sh b/bin/update_pch.sh
index 78b4a47e6044..4c17a0374757 100755
--- a/bin/update_pch.sh
+++ b/bin/update_pch.sh
@@ -58,6 +58,11 @@ for x in $headers; do
         libname=`echo $header | sed -e s/.*precompiled_// -e s/\.hxx//`
 
         ./bin/update_pch "$module" "$libname"
+        exitcode=$?
+        if test $exitcode -ne 0 -a $exitcode -ne 2; then
+            echo Failed.
+            exit 1
+        fi
     fi
 done