diff --git a/src/challenges/challenges.c b/src/challenges/challenges.c
index 9fd474e..462ccf0 100644
--- a/src/challenges/challenges.c
+++ b/src/challenges/challenges.c
@@ -89,6 +89,8 @@ void loadChallenge(Mission *mission, cJSON *node)
 	int i;
 	Challenge *challenge;
 	
+	memset(&mission->challengeData, 0, sizeof(ChallengeData));
+	
 	mission->challengeData.isChallenge = 1;
 
 	/* limits */
@@ -99,6 +101,7 @@ void loadChallenge(Mission *mission, cJSON *node)
 	mission->challengeData.itemLimit = getJSONValue(node, "itemLimit", 0);
 	mission->challengeData.playerItemLimit = getJSONValue(node, "playerItemLimit", 0);
 	mission->challengeData.rescueLimit = getJSONValue(node, "rescueLimit", 0);
+	mission->challengeData.disableLimit = getJSONValue(node, "disableLimit", 0);
 
 	/* restrictions */
 	mission->challengeData.noMissiles = getJSONValue(node, "noMissiles", 0);
diff --git a/src/structs.h b/src/structs.h
index f3abe58..7f36383 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -257,6 +257,7 @@ typedef struct {
 	int escapeLimit;
 	int waypointLimit;
 	int rescueLimit;
+	int disableLimit;
 	int noMissiles;
 	int noBoost;
 	int noECM;