diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
new file mode 100644
index 0000000..59a57e6
--- /dev/null
+++ b/.github/workflows/windows.yml
@@ -0,0 +1,14 @@
+on: push
+jobs:
+  build:
+    runs-on: windows-latest
+    steps:
+    - uses: msys2/setup-msys2@v2
+      with:
+        msystem: msys
+        install: gcc make
+    - uses: actions/checkout@v4
+    - shell: msys2 {0}
+      run: |
+        ./configure
+        make all check bootstrap
diff --git a/configure b/configure
index 0d94402..3fbb863 100755
--- a/configure
+++ b/configure
@@ -122,7 +122,7 @@ case "$target" in
 	endfiles='"-l", "c", "-l", ":crtn.o"'
 	defines='"-D", "__builtin_stdarg_start(ap, last)=__builtin_va_start(ap, last)"'
 	;;
-*-*msys*)
+*-msys*)
 	startfiles='"-l", ":crt0.o"'
 	endfiles='"-l", "c", "-l", "msys-2.0", "-l", "kernel32"'
 	;;
diff --git a/pp.c b/pp.c
index 09d1a06..b24acf5 100644
--- a/pp.c
+++ b/pp.c
@@ -636,6 +636,7 @@ next(void)
 	tok = *t;
 	if (tok.kind == TIDENT)
 		keyword(&tok);
+	fprintf(stderr, "token=%d %s %s\n", tok.kind, tokstr[t->kind], tok.lit);
 }
 
 bool
diff --git a/scan.c b/scan.c
index 0e6e7b1..b2008c7 100644
--- a/scan.c
+++ b/scan.c
@@ -126,6 +126,7 @@ ident(struct scanner *s)
 	s->usebuf = true;
 	while (isalnum(s->chr) || s->chr == '_')
 		nextchar(s);
+	fprintf(stderr, "ident='%.*s'\n", (int)s->buf.len, s->buf.str);
 
 	return TIDENT;
 }