diff --git a/Makefile.common b/Makefile.common
index e5b26484a1..9aee4e5307 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -1072,7 +1072,6 @@ ifeq ($(HAVE_7ZIP),1)
            $(DEPS_DIR)/7zip/Bra86.o \
            $(DEPS_DIR)/7zip/7zFile.o \
            $(DEPS_DIR)/7zip/7zStream.o \
-           $(DEPS_DIR)/7zip/7zBuf2.o \
            $(DEPS_DIR)/7zip/LzmaDec.o \
            $(DEPS_DIR)/7zip/7zCrcOpt.o \
            $(DEPS_DIR)/7zip/Bra.o \
diff --git a/deps/7zip/7zBuf.h b/deps/7zip/7zBuf.h
index 6aee7da80a..66f9005327 100644
--- a/deps/7zip/7zBuf.h
+++ b/deps/7zip/7zBuf.h
@@ -20,18 +20,6 @@ void Buf_Init(CBuf *p);
 int Buf_Create(CBuf *p, size_t size, ISzAlloc *alloc);
 void Buf_Free(CBuf *p, ISzAlloc *alloc);
 
-typedef struct
-{
-  uint8_t *data;
-  size_t size;
-  size_t pos;
-} CDynBuf;
-
-void DynBuf_Construct(CDynBuf *p);
-void DynBuf_SeekToBeg(CDynBuf *p);
-int DynBuf_Write(CDynBuf *p, const uint8_t *buf, size_t size, ISzAlloc *alloc);
-void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc);
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/deps/7zip/7zBuf2.c b/deps/7zip/7zBuf2.c
deleted file mode 100644
index e6de7599a9..0000000000
--- a/deps/7zip/7zBuf2.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/* 7zBuf2.c -- uint8_t Buffer
-   2008-10-04 : Igor Pavlov : Public domain */
-
-#include <stdint.h>
-#include <string.h>
-#include "7zBuf.h"
-
-void DynBuf_Construct(CDynBuf *p)
-{
-   p->data = 0;
-   p->size = 0;
-   p->pos = 0;
-}
-
-void DynBuf_SeekToBeg(CDynBuf *p)
-{
-   p->pos = 0;
-}
-
-int DynBuf_Write(CDynBuf *p, const uint8_t *buf, size_t size, ISzAlloc *alloc)
-{
-   if (size > p->size - p->pos)
-   {
-      size_t current_size = p->pos + size;
-      size_t newSize = (current_size) + (current_size / 4);
-      uint8_t *data = (uint8_t *)alloc->Alloc(alloc, newSize);
-
-      if (data == 0)
-         return 0;
-
-      p->size = newSize;
-      memcpy(data, p->data, p->pos);
-      alloc->Free(alloc, p->data);
-      p->data = data;
-   }
-   memcpy(p->data + p->pos, buf, size);
-   p->pos += size;
-   return 1;
-}
-
-void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc)
-{
-   alloc->Free(alloc, p->data);
-   p->data = 0;
-   p->size = 0;
-   p->pos = 0;
-}
diff --git a/deps/7zip/RotateDefs.h b/deps/7zip/RotateDefs.h
deleted file mode 100644
index ff9b722902..0000000000
--- a/deps/7zip/RotateDefs.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/* RotateDefs.h -- Rotate functions
-2009-02-07 : Igor Pavlov : Public domain */
-
-#ifndef __ROTATE_DEFS_H
-#define __ROTATE_DEFS_H
-
-#ifdef _MSC_VER
-
-#include <stdlib.h>
-#define rotlFixed(x, n) _rotl((x), (n))
-#define rotrFixed(x, n) _rotr((x), (n))
-
-#else
-
-#define rotlFixed(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
-#define rotrFixed(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
-
-#endif
-
-#endif