diff --git a/boards/redbee-econotag/tools/ftditools/bbmc.c b/boards/redbee-econotag/tools/ftditools/bbmc.c
index f211f52eee..00f6ef1533 100644
--- a/boards/redbee-econotag/tools/ftditools/bbmc.c
+++ b/boards/redbee-econotag/tools/ftditools/bbmc.c
@@ -474,9 +474,9 @@ int print_and_prompt(struct ftdi_device_list *devlist)
         if (input[last] == '\n') {
             input[last] = '\0';
         }
-    }
 
-    sscanf(s, "%i", &sel);
+        sscanf(s, "%i", &sel);
+    }
 
     return sel;
 }
diff --git a/sys/net/ccn_lite/ccnl-core.c b/sys/net/ccn_lite/ccnl-core.c
index 7e13ccc820..5d1d33ca39 100644
--- a/sys/net/ccn_lite/ccnl-core.c
+++ b/sys/net/ccn_lite/ccnl-core.c
@@ -1467,12 +1467,13 @@ ccnl_core_RX(struct ccnl_relay_s *relay, int ifndx, unsigned char *data,
     DEBUGMSG(14, "ccnl_core_RX ifndx=%d, %d bytes\n", ifndx, datalen);
 
     from = ccnl_get_face_or_create(relay, ifndx, sender_id);
-    DEBUGMSG(1, "ccnl_core_RX: faceid=%d frag=%p\n", from->faceid, (void *) from->frag);
 
     if (!from) {
         return;
     }
 
+    DEBUGMSG(1, "ccnl_core_RX: faceid=%d frag=%p\n", from->faceid, (void *) from->frag);
+
     ccnl_core_RX_datagram(relay, from, &data, &datalen);
 }
 
diff --git a/sys/net/routing/rpl/rpl_dodag.c b/sys/net/routing/rpl/rpl_dodag.c
index 253f494900..cad23b33ca 100644
--- a/sys/net/routing/rpl/rpl_dodag.c
+++ b/sys/net/routing/rpl/rpl_dodag.c
@@ -286,12 +286,15 @@ rpl_parent_t *rpl_find_preferred_parent(void)
 void rpl_parent_update(rpl_parent_t *parent)
 {
     rpl_dodag_t *my_dodag = rpl_get_my_dodag();
-    uint16_t old_rank = my_dodag->my_rank;
+    uint16_t old_rank;
 
     if (my_dodag == NULL) {
         DEBUG("Not part of a dodag - this should not happen");
         return;
     }
+
+    old_rank = my_dodag->my_rank;
+
     /* update Parent lifetime */
     if (parent != NULL) {
         parent->lifetime = my_dodag->default_lifetime * my_dodag->lifetime_unit;