diff --git a/docs/install.rst b/docs/install.rst
index b8b6d6e..3b756de 100644
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -28,6 +28,8 @@ for matlab available <https://github.com/fastalgorithms/fmm3dbie/releases/tag/v1
 
 Instructions:
 
+- Select the zip file whose name has MATLAB version 2020 if your version is 2022 or older. Select 2023 otherwise.
+
 - The x86 version should work on most intel machines. The avx2 specification is also commonly available and will be faster if it is compatible with your machine.
 
 - Download the file and unzip. We recommend testing the fmm binaries by running the following in the matlab directory of fmm3dbie:
diff --git a/make.inc.windows.mingw b/make.inc.windows.mingw
index 6137014..7164e87 100644
--- a/make.inc.windows.mingw
+++ b/make.inc.windows.mingw
@@ -1,6 +1,6 @@
 # makefile overrides
 # OS:       windows
-# Compiler: mingw
+# Compiler: mingw 8.1 (changei MINGW_LPATH)
 # OpenMP:   default enabled unless specified
 #
 
@@ -26,5 +26,6 @@ ifeq ($(PREFIX),)
 endif
 
 
+MFLAGS=-compatibleArrayDims -DMWF77_UNDERSCORE0 "CFLAGS=-std=gnu17 -Wno-implicit-function-declaration -fPIC" 
 MINGW_LPATH=C:/mingw-w64/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0
 MEXLIBS = -lmex -lmat -lmx -lgfortran -lquadmath -L${MINGW_LPATH}