diff --git a/src/blockstore/CMakeLists.txt b/src/blockstore/CMakeLists.txt
index 7395cafd..5f130b19 100644
--- a/src/blockstore/CMakeLists.txt
+++ b/src/blockstore/CMakeLists.txt
@@ -30,6 +30,7 @@ set(SOURCES
   implementations/versioncounting/VersionCountingBlock.cpp
   implementations/versioncounting/VersionCountingBlockStore.cpp
   implementations/versioncounting/KnownBlockVersions.cpp
+  implementations/versioncounting/ClientIdAndBlockKey.cpp
 )
 
 add_library(${PROJECT_NAME} STATIC ${SOURCES})
diff --git a/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.cpp b/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.cpp
new file mode 100644
index 00000000..00f00d4c
--- /dev/null
+++ b/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.cpp
@@ -0,0 +1 @@
+#include "ClientIdAndBlockKey.h"
\ No newline at end of file
diff --git a/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.h b/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.h
index aa83ca18..45d49c30 100644
--- a/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.h
+++ b/src/blockstore/implementations/versioncounting/ClientIdAndBlockKey.h
@@ -3,6 +3,7 @@
 #define MESSMER_BLOCKSTORE_IMPLEMENTATIONS_VERSIONCOUNTING_CLIENTIDANDBLOCKKEY_H_
 
 #include <utility>
+#include "../../utils/Key.h"
 
 namespace blockstore {
     namespace versioncounting {