diff --git a/src/system/libroot/posix/sys/mman.cpp b/src/system/libroot/posix/sys/mman.cpp
index bcbaee9ed5..8de57a3dd7 100644
--- a/src/system/libroot/posix/sys/mman.cpp
+++ b/src/system/libroot/posix/sys/mman.cpp
@@ -131,6 +131,8 @@ mmap(void* address, size_t length, int protection, int flags, int fd,
 		areaProtection |= B_WRITE_AREA;
 	if ((protection & PROT_EXEC) != 0)
 		areaProtection |= B_EXECUTE_AREA;
+	if (protection == PROT_NONE)
+		areaProtection = B_OVERCOMMITTING_AREA;
 
 	// create a name for this area based on calling image
 	void* addr = __builtin_return_address(0);