diff --git a/src/common.py b/src/common.py
index 4c1b53463..c72fcc34b 100644
--- a/src/common.py
+++ b/src/common.py
@@ -190,7 +190,7 @@ def exec_command(executable, *parameters):
     command = [executable]
     command.extend(parameters)
     try:
-        os.WEXITSTATUS(os.system(command[0] +" "+ command[1]))
+        os.WEXITSTATUS(os.system(command[0] + " \"%s\"" %command[1]))
     except OSError:
         import gtk