diff --git a/addons/advanced_ballistics/XEH_postInit.sqf b/addons/advanced_ballistics/XEH_postInit.sqf
index b2f73b4c81..783a5be569 100644
--- a/addons/advanced_ballistics/XEH_postInit.sqf
+++ b/addons/advanced_ballistics/XEH_postInit.sqf
@@ -2,6 +2,8 @@
 
 #include "initKeybinds.sqf"
 
+GVAR(currentbulletID) = -1;
+
 GVAR(bulletDatabase) = [];
 GVAR(bulletDatabaseStartTime) = [];
 GVAR(bulletDatabaseSpeed) = [];
@@ -31,4 +33,13 @@ GVAR(AtmosphericDensitySimulationEnabled) = true;
 GVAR(currentGrid) = 0;
 GVAR(INIT_MESSAGE_ENABLED) = false;
 
+GVAR(extensionAvailable) = "ace_advanced_ballistics" callExtension "version" == "1.0";
+if (!GVAR(extensionAvailable)) exitWith {
+    if ("ace_advanced_ballistics" callExtension "version" == "") then {
+        diag_log text "[ACE] ERROR: ace_advanced_ballistics.dll is missing";
+    } else {
+        diag_log text "[ACE] ERROR: ace_advanced_ballistics.dll is incompatible";
+    };
+};
+
 [] call FUNC(initializeTerrainExtension);
diff --git a/addons/advanced_ballistics/functions/fnc_initializeTerrainExtension.sqf b/addons/advanced_ballistics/functions/fnc_initializeTerrainExtension.sqf
index 5403cc5e50..6791d26350 100644
--- a/addons/advanced_ballistics/functions/fnc_initializeTerrainExtension.sqf
+++ b/addons/advanced_ballistics/functions/fnc_initializeTerrainExtension.sqf
@@ -12,7 +12,8 @@
  */
 #include "script_component.hpp"
 
-if ("ace_advanced_ballistics" callExtension "version" != "1.0") exitWith {};
+if (!hasInterface) exitWith {};
+if (!GVAR(extensionAvailable)) exitWith {};
 
 private ["_initStartTime", "_mapSize", "_mapGrids", "_gridCells", "_x", "_y", "_gridCenter", "_gridHeight", "_gridNumObjects", "_gridSurfaceIsWater"];