diff --git a/libutils/Android.bp b/libutils/Android.bp
index 4bd2a98..6b50f0c 100644
--- a/libutils/Android.bp
+++ b/libutils/Android.bp
@@ -136,9 +136,12 @@
             cflags: ["-Wno-unused-parameter"],
         },
 
-        // Under MinGW, ctype.h doesn't need multi-byte support
         windows: {
-            cflags: ["-DMB_CUR_MAX=1"],
+            cflags: [
+                // Under MinGW, ctype.h doesn't need multi-byte support
+                "-DMB_CUR_MAX=1",
+                "-Wno-unused-private-field",
+            ],
 
             enabled: true,
         },
diff --git a/libutils/Threads.cpp b/libutils/Threads.cpp
index 6317c32..7d7f0e2 100644
--- a/libutils/Threads.cpp
+++ b/libutils/Threads.cpp
@@ -348,7 +348,7 @@
     mState = (void*) hMutex;
 }
 
-Mutex::Mutex(const char* name)
+Mutex::Mutex(const char* /*name*/)
 {
     // XXX: name not used for now
     HANDLE hMutex;
@@ -359,7 +359,7 @@
     mState = (void*) hMutex;
 }
 
-Mutex::Mutex(int type, const char* name)
+Mutex::Mutex(int /*type*/, const char* /*name*/)
 {
     // XXX: type and name not used for now
     HANDLE hMutex;
diff --git a/libutils/misc.cpp b/libutils/misc.cpp
index d95fd05..da28dfa 100644
--- a/libutils/misc.cpp
+++ b/libutils/misc.cpp
@@ -44,8 +44,8 @@
 static Vector<sysprop_change_callback_info>* gSyspropList = NULL;
 #endif
 
-void add_sysprop_change_callback(sysprop_change_callback cb, int priority) {
 #if !defined(_WIN32)
+void add_sysprop_change_callback(sysprop_change_callback cb, int priority) {
     pthread_mutex_lock(&gSyspropMutex);
     if (gSyspropList == NULL) {
         gSyspropList = new Vector<sysprop_change_callback_info>();
@@ -65,8 +65,10 @@
         gSyspropList->add(info);
     }
     pthread_mutex_unlock(&gSyspropMutex);
-#endif
 }
+#else
+void add_sysprop_change_callback(sysprop_change_callback, int) {}
+#endif
 
 #if defined(__ANDROID__)
 void (*get_report_sysprop_change_func())() {