diff --git a/scripts/Python/build-swig-Python.sh b/scripts/Python/build-swig-Python.sh
index 17b880a..56a54ce 100755
--- a/scripts/Python/build-swig-Python.sh
+++ b/scripts/Python/build-swig-Python.sh
@@ -19,6 +19,7 @@
 
 swig_output_file=${SRC_ROOT}/source/LLDBWrapPython.cpp
 swig_input_file=${SRC_ROOT}/scripts/lldb.swig
+swig_input_file2=${SRC_ROOT}/scripts/Python/python-extensions.swig
 
 
 if [ -n "$debug_flag" -a "$debug_flag" == "-debug" ]
@@ -119,6 +120,19 @@
     fi
 fi
 
+if [ $NeedToUpdate == 0 ]
+then
+    if [ ${swig_input_file2} -nt ${swig_output_file} ]
+    then
+        NeedToUpdate=1
+        if [ $Debug == 1 ]
+        then
+            echo "${swig_input_file2} is newer than ${swig_output_file}"
+            echo "swig file will need to be re-built."
+        fi
+    fi
+fi
+
 os_name=`uname -s`
 python_version=`/usr/bin/python --version 2>&1 | sed -e 's,Python ,,' -e 's,[.][0-9],,2' -e 's,[a-z][a-z][0-9],,'`
 
@@ -147,6 +161,10 @@
     exit 0
 else
     echo "SWIG needs to be re-run."
+    if [ -f ${swig_output_file} ]
+    then
+        rm ${swig_output_file}
+    fi
 fi