diff --git a/src/ctselect/ctselect.par b/src/ctselect/ctselect.par
index fa698c5..641fb2b 100644
--- a/src/ctselect/ctselect.par
+++ b/src/ctselect/ctselect.par
@@ -32,8 +32,8 @@ tmin,    r, a, 0.0,,, "Start time (CTA MET in seconds)"
 tmax,    r, a, 0.0,,, "End time (CTA MET in seconds)"
 emin,    r, a, 0.1,,, "Lower energy limit (TeV)"
 emax,    r, a, 100.0,,, "Upper energy limit (TeV)"
-phasemin,r, h, NONE,,, "Lower phase limit"
-phasemax,r, h, NONE,,, "Upper phase limit"
+phasemin,r, h, 0.0,0,1, "Lower phase limit"
+phasemax,r, h, 1.0,0,1, "Upper phase limit"
 expr,    s, h, "",,, "Additional selection expression"
 usethres,s, h, "NONE",NONE|DEFAULT|USER,, "Energy threshold type"