diff --git a/src/scripting/vmthunks.cpp b/src/scripting/vmthunks.cpp
index 0b0391bd0..0569dc20c 100644
--- a/src/scripting/vmthunks.cpp
+++ b/src/scripting/vmthunks.cpp
@@ -2436,6 +2436,12 @@ DEFINE_ACTION_FUNCTION(FLevelLocals, GetDisplacement)
 	ACTION_RETURN_VEC2(ofs);
 }
 
+DEFINE_ACTION_FUNCTION(FLevelLocals, GetPortalGroupCount)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(FLevelLocals);
+	ACTION_RETURN_INT(self->Displacements.size);
+}
+
 void SphericalCoords(FLevelLocals *self, double vpX, double vpY, double vpZ, double tX, double tY, double tZ, double viewYaw, double viewPitch, int absolute, DVector3 *result)
 {
 	
diff --git a/wadsrc/static/zscript/doombase.zs b/wadsrc/static/zscript/doombase.zs
index 5425c7b00..7e8190ba2 100644
--- a/wadsrc/static/zscript/doombase.zs
+++ b/wadsrc/static/zscript/doombase.zs
@@ -492,6 +492,7 @@ struct LevelLocals native
 	native clearscope vector3 Vec2OffsetZ(vector2 pos, vector2 dir, double atz, bool absolute = false) const;
 	native clearscope vector3 Vec3Offset(vector3 pos, vector3 dir, bool absolute = false) const;
 	native clearscope Vector2 GetDisplacement(int pg1, int pg2) const;
+	native clearscope int GetPortalGroupCount() const;
 
 	native String GetChecksum() const;