diff --git a/src/nvim/CMakeLists.txt b/src/nvim/CMakeLists.txt
index cdfc6367e5..4d83e9b1ea 100644
--- a/src/nvim/CMakeLists.txt
+++ b/src/nvim/CMakeLists.txt
@@ -435,7 +435,6 @@ set(NO_SINGLE_CHECK_HEADERS
   mbyte.h
   memfile_defs.h
   memline.h
-  memline_defs.h
   menu.h
   misc2.h
   msgpack_rpc/server.h
diff --git a/src/nvim/memfile_defs.h b/src/nvim/memfile_defs.h
index cc71e1a7ff..57d8abbe30 100644
--- a/src/nvim/memfile_defs.h
+++ b/src/nvim/memfile_defs.h
@@ -3,8 +3,10 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include <stdlib.h> // for size_t
 
 #include "nvim/types.h"
+#include "nvim/pos.h" // for linenr_T
 
 /// A block number.
 ///