diff --git a/ogr/ogr_proj_p.cpp b/ogr/ogr_proj_p.cpp
index f160cc9c96ea..f47691e763d5 100644
--- a/ogr/ogr_proj_p.cpp
+++ b/ogr/ogr_proj_p.cpp
@@ -35,14 +35,6 @@
 
 #include "proj.h"
 
-#if defined(__MACH__) && defined(__APPLE__) && defined(HAVE_PTHREAD_ATFORK)
-// Works around a weird issue with GDAL, numpy and python threading on
-// Mac. There is definitely something not understood, but as using pthread_atfork()
-// is just an optimization, just disable it.
-// Cf https://github.com/OSGeo/gdal/issues/8497 for details
-#undef HAVE_PTHREAD_ATFORK
-#endif
-
 #ifndef _WIN32
 #include <sys/types.h>
 #include <unistd.h>