diff --git a/lib/common/zbuff.h b/lib/common/zbuff.h
index d761a273..1f8cb610 100644
--- a/lib/common/zbuff.h
+++ b/lib/common/zbuff.h
@@ -163,19 +163,10 @@ ZSTDLIB_API size_t ZBUFF_recommendedDOutSize(void);
 #ifdef ZBUFF_STATIC_LINKING_ONLY
 
 /* *************************************
-*  Includes
+*  Dependency
 ***************************************/
 #include "zstd_static.h"     /* ZSTD_parameters */
 
-/* internal util function */
-#define ZBUFF_MIN(a,b) ((a)<(b) ? (a) : (b))
-MEM_STATIC size_t ZBUFF_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
-{
-    size_t length = ZBUFF_MIN(dstCapacity, srcSize);
-    memcpy(dst, src, length);
-    return length;
-}
-
 
 /*-*************************************
 *  Advanced functions
diff --git a/lib/compress/zbuff_compress.c b/lib/compress/zbuff_compress.c
index 65390c29..76d3afea 100644
--- a/lib/compress/zbuff_compress.c
+++ b/lib/compress/zbuff_compress.c
@@ -183,6 +183,15 @@ size_t ZBUFF_compressInit(ZBUFF_CCtx* zbc, int compressionLevel)
 }
 
 
+/* internal util function */
+MEM_STATIC size_t ZBUFF_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
+{
+    size_t const length = MIN(dstCapacity, srcSize);
+    memcpy(dst, src, length);
+    return length;
+}
+
+
 /* *** Compression *** */
 
 static size_t ZBUFF_compressContinue_generic(ZBUFF_CCtx* zbc,
diff --git a/lib/decompress/zbuff_decompress.c b/lib/decompress/zbuff_decompress.c
index e3d57435..080e3dea 100644
--- a/lib/decompress/zbuff_decompress.c
+++ b/lib/decompress/zbuff_decompress.c
@@ -138,6 +138,15 @@ size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbd)
 }
 
 
+/* internal util function */
+MEM_STATIC size_t ZBUFF_limitCopy(void* dst, size_t dstCapacity, const void* src, size_t srcSize)
+{
+    size_t const length = MIN(dstCapacity, srcSize);
+    memcpy(dst, src, length);
+    return length;
+}
+
+
 /* *** Decompression *** */
 
 size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbd,