diff --git a/source/includes/CarlaDefines.h b/source/includes/CarlaDefines.h
index c393081c6..04e954592 100644
--- a/source/includes/CarlaDefines.h
+++ b/source/includes/CarlaDefines.h
@@ -324,5 +324,8 @@ typedef unsigned short int ushort;
 typedef unsigned int uint;
 typedef unsigned long int ulong;
 typedef unsigned long long int ulonglong;
+#ifdef _MSC_VER
+typedef SSIZE_T ssize_t;
+#endif
 
 #endif /* CARLA_DEFINES_H_INCLUDED */
diff --git a/source/utils/CarlaMutex.hpp b/source/utils/CarlaMutex.hpp
index 8fe6ede0d..dab04e8a5 100644
--- a/source/utils/CarlaMutex.hpp
+++ b/source/utils/CarlaMutex.hpp
@@ -215,7 +215,9 @@ public:
 
         pthread_mutexattr_t mattr;
         pthread_mutexattr_init(&mattr);
+       #ifdef __GNUC__
         pthread_mutexattr_setprotocol(&mattr, PTHREAD_PRIO_INHERIT);
+       #endif
         pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_NORMAL);
         pthread_mutex_init(&fMutex, &mattr);
         pthread_mutexattr_destroy(&mattr);