diff --git a/configure b/configure
index 02b8afe..88df9ac 100755
--- a/configure
+++ b/configure
@@ -369,10 +369,14 @@ case "$SYSTEM" in
 		SYSTEM=mingw32
 		LDFLAGS="-mthreads $LDFLAGS"
 		;;
-  CYGWIN_NT*)
-    SYSTEM=cygwin
-    LDFLAGS="-mthreads $LDFLAGS"
-    ;;
+	MINGW64*)
+		SYSTEM=mingw64
+		LDFLAGS="-mthreads $LDFLAGS"
+		;;
+	CYGWIN_NT*)
+		SYSTEM=cygwin
+		LDFLAGS="-mthreads $LDFLAGS"
+		;;
 	*)
 		SYSTEM=
 		;;