diff --git a/src/hnswutils.c b/src/hnswutils.c
index 1e0f238..23f8d0b 100644
--- a/src/hnswutils.c
+++ b/src/hnswutils.c
@@ -6,7 +6,6 @@
 #include "catalog/pg_type.h"
 #include "catalog/pg_type_d.h"
 #include "fmgr.h"
-#include "halfutils.h"
 #include "halfvec.h"
 #include "hnsw.h"
 #include "lib/pairingheap.h"
diff --git a/src/ivfutils.c b/src/ivfutils.c
index 3fdcba9..728fa72 100644
--- a/src/ivfutils.c
+++ b/src/ivfutils.c
@@ -3,7 +3,6 @@
 #include "access/generic_xlog.h"
 #include "catalog/pg_type.h"
 #include "fmgr.h"
-#include "halfutils.h"
 #include "halfvec.h"
 #include "ivfflat.h"
 #include "storage/bufmgr.h"