diff --git a/[refs] b/[refs]
index 738b74e26021..2200760b5c74 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 67837f232d6d55be99d6e0dec4ea9bb8112840cd
+refs/heads/master: 6acee02712d0592dcd6120bc54d77c47cd2f6059
diff --git a/trunk/drivers/isdn/hisax/config.c b/trunk/drivers/isdn/hisax/config.c
index 8d53a7fd2671..a43162c2ef15 100644
--- a/trunk/drivers/isdn/hisax/config.c
+++ b/trunk/drivers/isdn/hisax/config.c
@@ -361,11 +361,11 @@ module_param_array(io1, int, NULL, 0);
 
 int nrcards;
 
-extern char *l1_revision;
-extern char *l2_revision;
-extern char *l3_revision;
-extern char *lli_revision;
-extern char *tei_revision;
+extern const char *l1_revision;
+extern const char *l2_revision;
+extern const char *l3_revision;
+extern const char *lli_revision;
+extern const char *tei_revision;
 
 char *HiSax_getrev(const char *revision)
 {