diff --git a/mmtk/Cargo.toml b/mmtk/Cargo.toml
index 196f5369..99244cd3 100644
--- a/mmtk/Cargo.toml
+++ b/mmtk/Cargo.toml
@@ -62,3 +62,5 @@ gencopy = []
 marksweep = []
 pageprotect = []
 immix = []
+genimmix = []
+stickyimmix = []
diff --git a/mmtk/src/api.rs b/mmtk/src/api.rs
index 402eea3a..25fb34af 100644
--- a/mmtk/src/api.rs
+++ b/mmtk/src/api.rs
@@ -72,6 +72,10 @@ pub extern "C" fn openjdk_gc_init(calls: *const OpenJDK_Upcalls) {
             Some(PlanSelector::PageProtect)
         } else if cfg!(feature = "immix") {
             Some(PlanSelector::Immix)
+        } else if cfg!(feature = "genimmix") {
+            Some(PlanSelector::GenImmix)
+        } else if cfg!(feature = "stickyimmix") {
+            Some(PlanSelector::StickyImmix)
         } else {
             None
         };