diff --git a/vlib/compiler/cflags.v b/vlib/compiler/cflags.v
index 60fe77bb9d..26f1032509 100644
--- a/vlib/compiler/cflags.v
+++ b/vlib/compiler/cflags.v
@@ -25,7 +25,7 @@ fn (v &V) get_os_cflags() []CFlag {
 	}
 	
 	for flag in v.table.cflags {
-		if flag.os == '' || (flag.os == 'linux' && v.pref.os == .linux) || (flag.os == 'darwin' && v.pref.os == .mac) || (flag.os == 'freebsd' && v.pref.os == .freebsd) || (flag.os == 'windows' && v.pref.os == .windows) {
+		if flag.os == '' || (flag.os == 'linux' && v.pref.os == .linux) || (flag.os == 'darwin' && v.pref.os == .mac) || (flag.os == 'freebsd' && v.pref.os == .freebsd) || (flag.os == 'windows' && v.pref.os == .windows) || (flag.os == 'mingw' && v.pref.os == .windows && v.pref.ccompiler != 'msvc') {
 			flags << flag
 		}
 		if flag.os in ctimedefines {
@@ -82,7 +82,7 @@ fn (table mut Table) parse_cflag(cflag string, mod string, ctimedefines []string
 		return true
 	}
 	mut fos := ''
-	mut allowed_os_overrides := ['linux','darwin','freebsd','windows']
+	mut allowed_os_overrides := ['linux', 'darwin', 'freebsd', 'windows', 'mingw']
 	allowed_os_overrides << ctimedefines
 	for os_override in allowed_os_overrides {
 		if !flag.starts_with( os_override ) { continue }
diff --git a/vlib/glfw/glfw.v b/vlib/glfw/glfw.v
index a255046ae2..002a039d1c 100644
--- a/vlib/glfw/glfw.v
+++ b/vlib/glfw/glfw.v
@@ -22,6 +22,7 @@ import gl
 #flag freebsd -Wl,-L/usr/local/lib,-lglfw
 #flag linux -lglfw
 #flag windows -lgdi32 -lshell32 -lglfw3
+#flag mingw -mwindows
 #include <GLFW/glfw3.h>
 // #flag darwin -framework Carbon
 // #flag darwin -framework Cocoa