Index: trunk/psastro/src/psastroChooseRefstars.c
===================================================================
--- trunk/psastro/src/psastroChooseRefstars.c	(revision 34967)
+++ trunk/psastro/src/psastroChooseRefstars.c	(revision 35050)
@@ -62,6 +62,6 @@
 
     int nMax = psMetadataLookupS32 (&status, recipe, "PSASTRO.MAX.NREF");
-    psF32 clampMagMin = psMetadataLookupS32 (&status, recipe, "REFSTAR_CLAMP_MAG_MIN");
-    if (!status) clampMagMin = -5;
+    psF32 clampMagMin = psMetadataLookupF32 (&status, recipe, "REFSTAR_CLAMP_MAG_MIN");
+    if (!status) clampMagMin = -5.0;
 
     // de-activate all files except PSASTRO.REFSTARS