diff --git a/deps/LZMA-SDK/C/Alloc.c b/deps/LZMA-SDK/C/Alloc.c
index 9f249c250..064701a8c 100644
--- a/deps/LZMA-SDK/C/Alloc.c
+++ b/deps/LZMA-SDK/C/Alloc.c
@@ -6,7 +6,7 @@
 #include <stdio.h>
 
 #ifdef _WIN32
-#include <Windows.h>
+#include <windows.h>
 #endif
 #include <stdlib.h>
 
diff --git a/deps/LZMA-SDK/C/CpuArch.c b/deps/LZMA-SDK/C/CpuArch.c
index bcdbc4cc1..e1443f51b 100644
--- a/deps/LZMA-SDK/C/CpuArch.c
+++ b/deps/LZMA-SDK/C/CpuArch.c
@@ -217,7 +217,7 @@ BoolInt CPU_Is_InOrder()
 }
 
 #if !defined(MY_CPU_AMD64) && defined(_WIN32)
-#include <Windows.h>
+#include <windows.h>
 static BoolInt CPU_Sys_Is_SSE_Supported()
 {
   OSVERSIONINFO vi;
@@ -275,7 +275,7 @@ BoolInt CPU_IsSupported_SHA()
 // #include <stdio.h>
 
 #ifdef _WIN32
-#include <Windows.h>
+#include <windows.h>
 #endif
 
 BoolInt CPU_IsSupported_VAES_AVX2()
@@ -327,7 +327,7 @@ BoolInt CPU_IsSupported_PageGB()
 
 #ifdef _WIN32
 
-#include <Windows.h>
+#include <windows.h>
 
 BoolInt CPU_IsSupported_CRC32()
   { return IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE) ? 1 : 0; }
diff --git a/deps/LZMA-SDK/C/DllSecur.c b/deps/LZMA-SDK/C/DllSecur.c
index b0a555c49..19a22a9f0 100644
--- a/deps/LZMA-SDK/C/DllSecur.c
+++ b/deps/LZMA-SDK/C/DllSecur.c
@@ -5,7 +5,7 @@
 
 #ifdef _WIN32
 
-#include <Windows.h>
+#include <windows.h>
 
 #include "DllSecur.h"
 
diff --git a/deps/LZMA-SDK/C/Threads.h b/deps/LZMA-SDK/C/Threads.h
index 8d4a10df9..c555c8b97 100644
--- a/deps/LZMA-SDK/C/Threads.h
+++ b/deps/LZMA-SDK/C/Threads.h
@@ -5,7 +5,7 @@
 #define __7Z_THREADS_H
 
 #ifdef _WIN32
-#include <Windows.h>
+#include <windows.h>
 #else
 
 #if !defined(__APPLE__) && !defined(_AIX)
diff --git a/include/workarounds/Windows.h b/include/workarounds/Windows.h
deleted file mode 100644
index 74fb132e5..000000000
--- a/include/workarounds/Windows.h
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * Author......: See docs/credits.txt
- * License.....: MIT
- */
-
-#ifndef _WINDOWS_H
-#define _WINDOWS_H
-
-// This is a workaround for files asking to include Windows.h instead of windows.h
-// The problem is that MinGW provides only windows.h
-// LZMA SDK will fail to cross compile for Windows on Linux
-
-#include <windows.h>
-
-#endif // _WINDOWS_H
diff --git a/src/Makefile b/src/Makefile
index 703885d59..4f99425e6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -254,11 +254,6 @@ ifeq ($(USE_SYSTEM_LZMA),1)
 LFLAGS                  += -llzmasdk
 endif
 
-## LZMA workaround for MSYS2
-ifeq ($(USE_SYSTEM_LZMA),0)
-CFLAGS                  += -Iinclude/workarounds
-endif
-
 # ZLIB
 CFLAGS                  += -I$(DEPS_ZLIB_PATH) -I$(DEPS_ZLIB_PATH)/contrib
 ifeq ($(USE_SYSTEM_ZLIB),1)