diff --git a/build/single_file_libs/zstd-in.c b/build/single_file_libs/zstd-in.c
index e6fca9e4a..f381ecc4f 100644
--- a/build/single_file_libs/zstd-in.c
+++ b/build/single_file_libs/zstd-in.c
@@ -69,6 +69,7 @@
 #include "compress/zstd_compress_literals.c"
 #include "compress/zstd_compress_sequences.c"
 #include "compress/zstd_compress_superblock.c"
+#include "compress/zstd_preSplit.c"
 #include "compress/zstd_compress.c"
 #include "compress/zstd_double_fast.c"
 #include "compress/zstd_fast.c"