diff --git a/repos/base-sel4/src/core/include/platform.h b/repos/base-sel4/src/core/include/platform.h
index 30d96db5b..8d2b53dd5 100644
--- a/repos/base-sel4/src/core/include/platform.h
+++ b/repos/base-sel4/src/core/include/platform.h
@@ -250,6 +250,9 @@ class Genode::Platform : public Platform_generic
 		Affinity::Space affinity_space() const override {
 			return sel4_boot_info().numNodes; }
 
+		bool supports_unmap() override { return true; }
+		bool supports_direct_unmap() const override { return true; }
+
 		/*******************
 		 ** seL4 specific **
 		 *******************/