diff --git a/source/utils/CarlaShmUtils.hpp b/source/utils/CarlaShmUtils.hpp
index 1d45b23b3..71ca6f0f7 100644
--- a/source/utils/CarlaShmUtils.hpp
+++ b/source/utils/CarlaShmUtils.hpp
@@ -27,7 +27,7 @@ struct carla_shm_t { HANDLE map; bool isServer; const char* filename; };
 # ifndef __WINE__
 #  include <cerrno>
 # endif
-# ifdef CARLA_OS_HAIKU
+# ifndef CARLA_OS_LINUX
 #  define MAP_LOCKED 0x0
 # endif
 # include <fcntl.h>
@@ -197,11 +197,7 @@ void* carla_shm_map(carla_shm_t& shm, const std::size_t size) noexcept
             CARLA_SAFE_ASSERT_RETURN(ret == 0, nullptr);
         }
 
-# ifdef CARLA_OS_MAC
-        void* const ptr(::mmap(nullptr, size, PROT_READ|PROT_WRITE, MAP_SHARED, shm.fd, 0));
-# else
         void* const ptr(::mmap(nullptr, size, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_LOCKED, shm.fd, 0));
-# endif
 
         if (ptr == nullptr)
         {
@@ -346,8 +342,12 @@ bool carla_shm_map(carla_shm_t& shm, T*& value) noexcept
     return (value != nullptr);
 }
 
+#endif // __WINE__
+
 // -----------------------------------------------------------------------
 
-#endif // __WINE__
+#ifndef CARLA_OS_LINUX
+# undef MAP_LOCKED
+#endif
 
 #endif // CARLA_SHM_UTILS_HPP_INCLUDED