diff --git a/src/land.c b/src/land.c
index 3a725d1..4fe1391 100644
--- a/src/land.c
+++ b/src/land.c
@@ -1207,10 +1207,21 @@ static void misn_accept(unsigned int wid, char* str) {
   char* misn_name;
   Mission* misn;
   int pos;
+  int i;
 
   misn_name = toolkit_getList(wid, "lstMission");
 
-  if(strcmp(misn_name, "No Missions")==0) return;
+  /* Make sure you have missions. */
+  if(strcmp(misn_name, "No Missions")==0)
+    return;
+
+  /* Make sure player can accept the mission. */
+  for(i = 0; i < MISSION_MAX; i++)
+    if(player_missions[i].data == NULL) break;
+  if(i >= MISSION_MAX) {
+    dialogue_alert("You have too many active missions.");
+    return;
+  }
   
   if(dialogue_YesNo("Accept Mission",
         "Are you sure you want to accept this mission?")) {