diff --git a/ogr_fdw.c b/ogr_fdw.c
index bb7e75a..cbb6cbd 100644
--- a/ogr_fdw.c
+++ b/ogr_fdw.c
@@ -1978,7 +1978,7 @@ ogrFeatureToSlot(const OGRFeatureH feat, TupleTableSlot* slot, const OgrFdwExecS
 						snprintf(cstr, 256, "%d-%02d-%02d %02d:%02d:%02d", year, month, day, hour, minute, second);
 					}
 #else
-					const char* cstr = OGR_F_GetFieldAsISO8601DateTime(feat, ogrfldnumm, NULL);
+					const char* cstr = OGR_F_GetFieldAsISO8601DateTime(feat, ogrfldnum, NULL);
 #endif
 					nulls[i] = false;
 					values[i] = pgDatumFromCString(cstr, pgtype, pgtypmod, pginputfunc);