diff --git a/src/arabic/StructuralAra.gf b/src/arabic/StructuralAra.gf
index 5c49c6bf7..8160f2eff 100644
--- a/src/arabic/StructuralAra.gf
+++ b/src/arabic/StructuralAra.gf
@@ -69,7 +69,7 @@ concrete StructuralAra of Structural = CatAra **
   she_Pron = mkPron "هِيَ" "ها" "ها" (Per3 Fem Sg) ;
 --  so_AdA = ss "سْ" ;
   somebody_NP = regNP "أَحَد" Sg ;
-  someSg_Det = mkDet "أَحَد" Pl Const ;
+  someSg_Det = mkDet "أَحَد" Sg Const ;
   somePl_Det = mkDet "بَعض" Pl Const ;
   something_NP = regNP "شَيْء" Sg ;
 --  somewhere_Adv = ss "سْموهري" ;