diff --git a/etc/bashrc b/etc/bashrc
index 07ed3283d..2418dbd49 100755
--- a/etc/bashrc
+++ b/etc/bashrc
@@ -219,6 +219,24 @@ MINGW32_NT-6.2)
     export WM_LDFLAGS='-m64'
     ;;
 
+MINGW64_NT-6.1)
+    WM_ARCH=mingw
+    export WM_ARCH_BASE=mingw
+    export WM_COMPILER_LIB_ARCH=64
+    export WM_CFLAGS='-m64 -fPIC'
+    export WM_CXXFLAGS='-m64 -fPIC'
+    export WM_LDFLAGS='-m64'
+    ;;
+
+MINGW64_NT-6.2)
+    WM_ARCH=mingw
+    export WM_ARCH_BASE=mingw
+    export WM_COMPILER_LIB_ARCH=64
+    export WM_CFLAGS='-m64 -fPIC'
+    export WM_CXXFLAGS='-m64 -fPIC'
+    export WM_LDFLAGS='-m64'
+    ;;
+
 Linux)
     WM_ARCH=linux