diff --git a/3rdParty/jemalloc/v5.0.1/src/pages.c b/3rdParty/jemalloc/v5.0.1/src/pages.c
index fec64dd01d..733652adf3 100644
--- a/3rdParty/jemalloc/v5.0.1/src/pages.c
+++ b/3rdParty/jemalloc/v5.0.1/src/pages.c
@@ -20,7 +20,7 @@ static size_t	os_page;
 
 #ifndef _WIN32
 #  define PAGES_PROT_COMMIT (PROT_READ | PROT_WRITE)
-#  define PAGES_PROT_DECOMMIT (PROT_NONE)
+#  define PAGES_PROT_DECOMMIT (PROT_READ | PROT_WRITE)
 static int	mmap_flags;
 #endif
 static bool	os_overcommits;