diff --git a/common/include/villas/memory_manager.hpp b/common/include/villas/memory_manager.hpp
index b860fea2b..b76e08623 100644
--- a/common/include/villas/memory_manager.hpp
+++ b/common/include/villas/memory_manager.hpp
@@ -196,12 +196,11 @@ public:
 	getProcessAddressSpaceMemoryBlock(const std::string &memoryBlock)
 	{ return getOrCreateAddressSpace(getSlaveAddrSpaceName("process", memoryBlock)); }
 
-
 	AddressSpaceId
 	getOrCreateAddressSpace(std::string name);
 
 	void
-	removeAddressSpace(AddressSpaceId addrSpaceId)
+	removeAddressSpace(const AddressSpaceId &addrSpaceId)
 	{ memoryGraph.removeVertex(addrSpaceId); }
 
 	/// Create a default mapping