diff --git a/gamedir/Data-1.13/APBPConstants.ini b/gamedir/Data-1.13/APBPConstants.ini
index c5ecff971..aec833a50 100644
--- a/gamedir/Data-1.13/APBPConstants.ini
+++ b/gamedir/Data-1.13/APBPConstants.ini
@@ -409,6 +409,11 @@ AP_EAT = 80
 ;***********************************************************************
 AP_CLEANINGKIT = 80
 
+;***********************************************************************
+;* The APs needed to arm a bomb or grenade in inventory
+;***********************************************************************
+AP_INVENTORY_EXPLOSIVE_ACTIVATE = 20
+
 [BPConstants]
 BP_RATIO_RED_PTS_TO_NORMAL = 100
 BP_RUN_ENERGYCOSTFACTOR = 3