diff --git a/plugins/include/halflife.inc b/plugins/include/halflife.inc
index a6b35702..a7790cc8 100644
--- a/plugins/include/halflife.inc
+++ b/plugins/include/halflife.inc
@@ -682,7 +682,7 @@ enum ClientRangeType
  * @param size          Maximum size of clients array.
  * @return              Number of client indexes written to clients array.
  */
-native int GetClientsInRange(float origin[3], ClientRangeType rangeType, int[] clients, int size);
+native int GetClientsInRange(const float origin[3], ClientRangeType rangeType, int[] clients, int size);
 
 /**
  * Retrieves the server's authentication string (SteamID).
diff --git a/plugins/include/sdktools_tempents.inc b/plugins/include/sdktools_tempents.inc
index e7724ec1..510d90d6 100644
--- a/plugins/include/sdktools_tempents.inc
+++ b/plugins/include/sdktools_tempents.inc
@@ -224,7 +224,7 @@ stock void TE_SendToClient(int client, float delay=0.0)
  * @param rangeType     Range type to use for filtering clients.
  * @param delay         Delay in seconds to send the TE.
  */
-stock void TE_SendToAllInRange(float origin[3], ClientRangeType rangeType, float delay=0.0)
+stock void TE_SendToAllInRange(const float origin[3], ClientRangeType rangeType, float delay=0.0)
 {
 	int[] clients = new int[MaxClients];
 	int total = GetClientsInRange(origin, rangeType, clients, MaxClients);