diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b612684d5c..ab9306447f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1247,7 +1247,7 @@ set (PCH_SOURCES
 	scripting/thingdef.cpp
 	scripting/thingdef_data.cpp
 	scripting/thingdef_properties.cpp
-	scripting/codegeneration/thingdef_expression.cpp
+	scripting/codegeneration/codegen.cpp
 	scripting/decorate/olddecorations.cpp
 	scripting/decorate/thingdef_exp.cpp
 	scripting/decorate/thingdef_parse.cpp
diff --git a/src/scripting/codegeneration/thingdef_expression.cpp b/src/scripting/codegeneration/codegen.cpp
similarity index 100%
rename from src/scripting/codegeneration/thingdef_expression.cpp
rename to src/scripting/codegeneration/codegen.cpp
diff --git a/src/scripting/codegeneration/thingdef_exp.h b/src/scripting/codegeneration/codegen.h
similarity index 100%
rename from src/scripting/codegeneration/thingdef_exp.h
rename to src/scripting/codegeneration/codegen.h