diff --git a/src/scripting/thingdef_data.cpp b/src/scripting/thingdef_data.cpp
index 274c865bf9..5f4898b369 100644
--- a/src/scripting/thingdef_data.cpp
+++ b/src/scripting/thingdef_data.cpp
@@ -1280,3 +1280,16 @@ DEFINE_ACTION_FUNCTION(FStringStruct, ToLower)
 	self->ToLower();
 	return 0;
 }
+
+DEFINE_ACTION_FUNCTION(FStringStruct, ToInt)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(FString);
+	PARAM_INT_DEF(base);
+	ACTION_RETURN_INT(self->ToLong(base));
+}
+
+DEFINE_ACTION_FUNCTION(FStringStruct, ToDouble)
+{
+	PARAM_SELF_STRUCT_PROLOGUE(FString);
+	ACTION_RETURN_FLOAT(self->ToDouble());
+}
diff --git a/wadsrc/static/zscript/base.txt b/wadsrc/static/zscript/base.txt
index e3f453fca1..f74c83e929 100644
--- a/wadsrc/static/zscript/base.txt
+++ b/wadsrc/static/zscript/base.txt
@@ -664,6 +664,8 @@ struct StringStruct native
 	native int LastIndexOf(String substr) const;
 	native void ToUpper();
 	native void ToLower();
+	native int ToInt(int base = 0) const;
+	native double ToDouble() const;
 }
 
 class SectorEffect : Thinker native