diff --git a/src/driver/slbt_host_params.c b/src/driver/slbt_host_params.c
index 690ca30..9fe8153 100644
--- a/src/driver/slbt_host_params.c
+++ b/src/driver/slbt_host_params.c
@@ -485,6 +485,18 @@ int slbt_init_host_params(
 	return 0;
 }
 
+static void slbt_free_host_tool_argv(char ** argv)
+{
+	char ** parg;
+
+	if (!argv)
+		return;
+
+	for (parg=argv; *parg; parg++)
+		free(*parg);
+
+	free(argv);
+}
 
 void slbt_free_host_params(struct slbt_host_strs * host)
 {
@@ -515,6 +527,13 @@ void slbt_free_host_params(struct slbt_host_strs * host)
 	if (host->mdso)
 		free(host->mdso);
 
+	slbt_free_host_tool_argv(host->ar_argv);
+	slbt_free_host_tool_argv(host->as_argv);
+	slbt_free_host_tool_argv(host->ranlib_argv);
+	slbt_free_host_tool_argv(host->windres_argv);
+	slbt_free_host_tool_argv(host->dlltool_argv);
+	slbt_free_host_tool_argv(host->mdso_argv);
+
 	memset(host,0,sizeof(*host));
 }
 
diff --git a/src/internal/slibtool_driver_impl.h b/src/internal/slibtool_driver_impl.h
index 2c5ea39..631a1b6 100644
--- a/src/internal/slibtool_driver_impl.h
+++ b/src/internal/slibtool_driver_impl.h
@@ -112,6 +112,12 @@ struct slbt_host_strs {
 	char *		windres;
 	char *		dlltool;
 	char *		mdso;
+	char **		ar_argv;
+	char **		as_argv;
+	char **		ranlib_argv;
+	char **		windres_argv;
+	char **		dlltool_argv;
+	char **		mdso_argv;
 };
 
 struct slbt_obj_list {