diff --git a/configure.ac b/configure.ac
index 571f96b283c5c610f9f6d2a544271d28a5e26420..ef1a88edcd390c509a1a6f83d2ef79ec922fd5f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -88,20 +88,20 @@ if test "x$GCC" = "xyes"; then
 	esac
 fi
 
+hb_os_win32=no
 AC_MSG_CHECKING([for native Win32])
 case "$host" in
   *-*-mingw*)
     hb_os_win32=yes
     ;;
-  *)
-    hb_os_win32=no
-    ;;
 esac
 AC_MSG_RESULT([$hb_os_win32])
 AM_CONDITIONAL(OS_WIN32, test "$hb_os_win32" = "yes")
 
 have_pthread=false
-AX_PTHREAD([have_pthread=true])
+if test "$hb_os_win32" = no; then
+	AX_PTHREAD([have_pthread=true])
+fi
 if $have_pthread; then
 	AC_DEFINE(HAVE_PTHREAD, 1, [Have POSIX threads])
 fi
diff --git a/src/hb-atomic-private.hh b/src/hb-atomic-private.hh
index 4ae5b866a5fdc2472b81ec19c8f01d94426370f2..5861a7124b3ddca64453796726ca72b8d635cf48 100644
--- a/src/hb-atomic-private.hh
+++ b/src/hb-atomic-private.hh
@@ -85,19 +85,6 @@ typedef int hb_atomic_int_t;
 #define hb_atomic_ptr_get(P)		(void *) (__sync_synchronize (), *(P))
 #define hb_atomic_ptr_cmpexch(P,O,N)	__sync_bool_compare_and_swap ((P), (O), (N))
 
-#elif !defined(HB_NO_MT) && defined(HAVE_GLIB)
-
-#include <glib.h>
-typedef int hb_atomic_int_t;
-#if GLIB_CHECK_VERSION(2,29,5)
-#define hb_atomic_int_add(AI, V)	g_atomic_int_add (&(AI), (V))
-#else
-#define hb_atomic_int_add(AI, V)	g_atomic_int_exchange_and_add (&(AI), (V))
-#endif
-
-#define hb_atomic_ptr_get(P)		g_atomic_pointer_get (P)
-#define hb_atomic_ptr_cmpexch(P,O,N)	g_atomic_pointer_compare_and_exchange ((void **) (P), (void *) (O), (void *) (N))
-
 
 #elif !defined(HB_NO_MT)
 
diff --git a/src/hb-mutex-private.hh b/src/hb-mutex-private.hh
index fc8ef4959951b6250e3ca5871d5b9bf4164ed4a4..5b3a17e917488ffc7283584840c2d68b5fa6fc29 100644
--- a/src/hb-mutex-private.hh
+++ b/src/hb-mutex-private.hh
@@ -65,26 +65,6 @@ typedef pthread_mutex_t hb_mutex_impl_t;
 #define hb_mutex_impl_finish(M)	pthread_mutex_destroy (M)
 
 
-#elif !defined(HB_NO_MT) && defined(HAVE_GLIB)
-
-#include <glib.h>
-#if !GLIB_CHECK_VERSION(2,32,0)
-typedef GStaticMutex hb_mutex_impl_t;
-#define HB_MUTEX_IMPL_INIT	G_STATIC_MUTEX_INIT
-#define hb_mutex_impl_init(M)	g_static_mutex_init (M)
-#define hb_mutex_impl_lock(M)	g_static_mutex_lock (M)
-#define hb_mutex_impl_unlock(M)	g_static_mutex_unlock (M)
-#define hb_mutex_impl_finish(M)	g_static_mutex_free (M)
-#else
-typedef GMutex hb_mutex_impl_t;
-#define HB_MUTEX_IMPL_INIT	{0}
-#define hb_mutex_impl_init(M)	g_mutex_init (M)
-#define hb_mutex_impl_lock(M)	g_mutex_lock (M)
-#define hb_mutex_impl_unlock(M)	g_mutex_unlock (M)
-#define hb_mutex_impl_finish(M)	g_mutex_clear (M)
-#endif
-
-
 #elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
 
 #if defined(HAVE_SCHED_H) && defined(HAVE_SCHED_YIELD)