diff --git a/lib/proj/convert.c b/lib/proj/convert.c
index fc77e4e6180..796793a7b02 100644
--- a/lib/proj/convert.c
+++ b/lib/proj/convert.c
@@ -1066,6 +1066,8 @@ static const char *papszDatumEquiv[] = {
     "Deutsches_Hauptdreiecksnetz",
     "South_American_1969",
     "South_American_Datum_1969",
+    "International_Terrestrial_Reference_Frame_1992",
+    "ITRF92",
     "ITRF_1992",
     "ITRF92",
     NULL