1 files changed, 1 insertions, 1 deletions

diff --git a/src/population.h b/src/population.h
index c2d1bec..4c7d435 100644
--- a/src/population.h
+++ b/src/population.h
@@ -26,7 +26,7 @@ namespace Genetic
                 int getSize() const { return hPhenotype.getSize(); }
 
                 PhenotypeId addPhenotype( Phenotype *pNew );
-                Phenotype *getPhenotype( PhenotypeId id )
+                Phenotype *getPhenotype( PhenotypeId id ) const
                         { return hPhenotype.get( id ); }
                 bool hasProperty( PhenotypeId id, const Bu::String &sKey ) const;
                 Bu::Variant getProperty( PhenotypeId id, const Bu::String &sKey ) const;