diff --git a/src/common/scripting/interface/vmnatives.cpp b/src/common/scripting/interface/vmnatives.cpp
index 5a7d25cce7..8f9f8dfad8 100644
--- a/src/common/scripting/interface/vmnatives.cpp
+++ b/src/common/scripting/interface/vmnatives.cpp
@@ -758,6 +758,16 @@ DEFINE_ACTION_FUNCTION(_Wads, FindLump)
 	ACTION_RETURN_INT(isLumpValid ? fileSystem.FindLump(name, &startlump, 0 != ns) : -1);
 }
 
+DEFINE_ACTION_FUNCTION(_Wads, FindLumpFullName)
+{
+	PARAM_PROLOGUE;
+	PARAM_STRING(name);
+	PARAM_INT(startlump);
+	PARAM_BOOL(noext);
+	const bool isLumpValid = startlump >= 0 && startlump < fileSystem.GetNumEntries();
+	ACTION_RETURN_INT(isLumpValid ? fileSystem.FindLumpFullName(name, &startlump, noext) : -1);
+}
+
 DEFINE_ACTION_FUNCTION(_Wads, GetLumpName)
 {
 	PARAM_PROLOGUE;
diff --git a/wadsrc/static/zscript/engine/base.zs b/wadsrc/static/zscript/engine/base.zs
index a37369847e..e8b58c3e79 100644
--- a/wadsrc/static/zscript/engine/base.zs
+++ b/wadsrc/static/zscript/engine/base.zs
@@ -829,6 +829,7 @@ struct Wads	// todo: make FileSystem an alias to 'Wads'
 	native static int CheckNumForName(string name, int ns, int wadnum = -1, bool exact = false);
 	native static int CheckNumForFullName(string name);
 	native static int FindLump(string name, int startlump = 0, FindLumpNamespace ns = GlobalNamespace);
+	native static int FindLumpFullName(string name, int startlump = 0, bool noext = false);
 	native static string ReadLump(int lump);
 
 	native static int GetNumLumps();