diff --git a/src/g_shared/a_dynlight.cpp b/src/g_shared/a_dynlight.cpp
index d676977a3..0273f07b5 100644
--- a/src/g_shared/a_dynlight.cpp
+++ b/src/g_shared/a_dynlight.cpp
@@ -179,7 +179,7 @@ DEFINE_ACTION_FUNCTION_NATIVE(ADynamicLight, ActivateLight, ActivateLight)
 
 void DeactivateLight(AActor *self)
 {
-	for (auto l : self->AttachedLights) l->Activate();
+	for (auto l : self->AttachedLights) l->Deactivate();
 }
 
 DEFINE_ACTION_FUNCTION_NATIVE(ADynamicLight, DeactivateLight, DeactivateLight)