diff --git a/patches/patchinstall.sh b/patches/patchinstall.sh
index ca8a7599..695221c0 100755
--- a/patches/patchinstall.sh
+++ b/patches/patchinstall.sh
@@ -341,6 +341,7 @@ patch_enable_all ()
 	enable_winex11_drv_mouse_coorrds="$1"
 	enable_wininet_Cleanup="$1"
 	enable_winmm_Delay_Import_Depends="$1"
+	enable_winmm_Replace_OpenFile="$1"
 	enable_winmm_mciSendCommandA="$1"
 	enable_wintab32_improvements="$1"
 	enable_wintrust_WTHelperGetProvCertFromChain="$1"
@@ -1134,6 +1135,9 @@ patch_enable ()
 		winmm-Delay_Import_Depends)
 			enable_winmm_Delay_Import_Depends="$2"
 			;;
+		winmm-Replace_OpenFile)
+			enable_winmm_Replace_OpenFile="$2"
+			;;
 		winmm-mciSendCommandA)
 			enable_winmm_mciSendCommandA="$2"
 			;;
@@ -4962,7 +4966,7 @@ fi
 # Patchset ntdll-avoid-fstatat
 # |
 # | Modified files:
-# |   *	dlls/ntdll/file.c
+# |   *	dlls/ntdll/directory.c, dlls/ntdll/file.c, dlls/ntdll/ntdll_misc.h
 # |
 if test "$enable_ntdll_avoid_fstatat" -eq 1; then
 	patch_apply ntdll-avoid-fstatat/0001-ntdll-Avoid-fstatat.patch
@@ -7084,6 +7088,21 @@ if test "$enable_winmm_Delay_Import_Depends" -eq 1; then
 	) >> "$patchlist"
 fi
 
+# Patchset winmm-Replace_OpenFile
+# |
+# | This patchset fixes the following Wine bugs:
+# |   *	[#48832] When _lopen to avoid the 128 character path limit.
+# |
+# | Modified files:
+# |   *	dlls/winmm/mmio.c
+# |
+if test "$enable_winmm_Replace_OpenFile" -eq 1; then
+	patch_apply winmm-Replace_OpenFile/0001-winmm-Use-_lopen-instead-of-OpenFile.patch
+	(
+		printf '%s\n' '+    { "Alistair Leslie-Hughes", "winmm: Use _lopen instead of OpenFile.", 1 },';
+	) >> "$patchlist"
+fi
+
 # Patchset winmm-mciSendCommandA
 # |
 # | Modified files:
diff --git a/patches/winmm-Replace_OpenFile/0001-winmm-Use-_lopen-instead-of-OpenFile.patch b/patches/winmm-Replace_OpenFile/0001-winmm-Use-_lopen-instead-of-OpenFile.patch
new file mode 100644
index 00000000..e1116fe0
--- /dev/null
+++ b/patches/winmm-Replace_OpenFile/0001-winmm-Use-_lopen-instead-of-OpenFile.patch
@@ -0,0 +1,29 @@
+From 43e66ffa7f33e03b9d15faff025fe3b4f536280e Mon Sep 17 00:00:00 2001
+From: Alistair Leslie-Hughes <leslie_alistair@hotmail.com>
+Date: Sat, 28 Mar 2020 17:26:29 +1100
+Subject: [PATCH] winmm: Use _lopen instead of OpenFile.
+
+OpenFile has a limit of a filepath limit of 128.
+Use _lopen which calls through to CreateFile which
+has a greater limit.
+---
+ dlls/winmm/mmio.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/dlls/winmm/mmio.c b/dlls/winmm/mmio.c
+index 6f143019751..30adcd0f228 100644
+--- a/dlls/winmm/mmio.c
++++ b/dlls/winmm/mmio.c
+@@ -76,8 +76,7 @@ static LRESULT CALLBACK mmioDosIOProc(LPMMIOINFO lpmmioinfo, UINT uMessage,
+ 
+ 	    /* if filename NULL, assume open file handle in adwInfo[0] */
+ 	    if (szFileName) {
+-                OFSTRUCT    ofs;
+-                lpmmioinfo->adwInfo[0] = OpenFile(szFileName, &ofs, lpmmioinfo->dwFlags & 0xFFFF);
++                lpmmioinfo->adwInfo[0] = _lopen(szFileName, lpmmioinfo->dwFlags);
+             }
+ 	    if (lpmmioinfo->adwInfo[0] == HFILE_ERROR)
+ 		ret = MMIOERR_FILENOTFOUND;
+-- 
+2.25.1
+
diff --git a/patches/winmm-Replace_OpenFile/definition b/patches/winmm-Replace_OpenFile/definition
new file mode 100644
index 00000000..8520a01b
--- /dev/null
+++ b/patches/winmm-Replace_OpenFile/definition
@@ -0,0 +1 @@
+Fixes: [48832] When _lopen to avoid the 128 character path limit.