diff --git a/config_LST1_2MAGIC_protons.cfg b/config_LST1_2MAGIC_protons.cfg
index 8f0f5c5..e965dee 100644
--- a/config_LST1_2MAGIC_protons.cfg
+++ b/config_LST1_2MAGIC_protons.cfg
@@ -30,7 +30,7 @@ THETAP  @theta@ @theta@      // Range of zenith angles (degree)
 IACT setenv ZA  @theta@
 PHIP @phip@ @phip@   // CORSIKA azimuth angles (degree) for primaries coming from South.
 IACT setenv AZM @az@ 
-VIEWCONE @viewcone_min @viewcone_max@ // Custom viewcone setting
+VIEWCONE @viewcone_min@ @viewcone_max@ // Custom viewcone setting
 NSHOW    @NShower@          // Requires NSHOW environment variable.
 ERANGE   @Emin@ @Emax@ // Requires EMIN and EMAX in units of GeV.
 ESLOPE -2.0             // Slope of primary energy spectrum (-2.0 is equal CPU time per decade)