diff --git a/tools/export/uvision/__init__.py b/tools/export/uvision/__init__.py
index 154a56ca04..0c8e35b12c 100644
--- a/tools/export/uvision/__init__.py
+++ b/tools/export/uvision/__init__.py
@@ -166,7 +166,7 @@ class Uvision(Exporter):
         # Flag is invalid if set in template
         # Optimizations are also set in the template
         invalid_flag = lambda x: x in template or re.match("-O(\d|time)", x) 
-        flags['c_flags'] = [flag for flag in c_flags if not invalid_flag(flag)]
+        flags['c_flags'] = [flag.replace('"','\\"') for flag in c_flags if not invalid_flag(flag)]
         flags['c_flags'] = " ".join(flags['c_flags'])
         return flags