diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index 5b6705c4b2d2..fd1728d94bab 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -485,7 +485,7 @@ int LZ4_decompress_fast(const char *source, char *dest, int originalSize)
 
 /* ===== Instantiate a few more decoding cases, used more than once. ===== */
 
-int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
+static int LZ4_decompress_safe_withPrefix64k(const char *source, char *dest,
 				      int compressedSize, int maxOutputSize)
 {
 	return LZ4_decompress_generic(source, dest,