diff --git a/gap/prop.gd b/gap/prop.gd
index 9d18f01b8..39bc6c2dc 100644
--- a/gap/prop.gd
+++ b/gap/prop.gd
@@ -40,3 +40,5 @@ InstallTrueMethod(IsSymmetricDigraph, IsCompleteDigraph);
 InstallTrueMethod(IsTransitiveDigraph, IsCompleteDigraph);
 InstallTrueMethod(IsAcyclicDigraph, IsEmptyDigraph);
 InstallTrueMethod(IsRegularDigraph, IsInRegularDigraph and IsOutRegularDigraph);
+InstallTrueMethod(IsStronglyConnectedDigraph,
+                  IsConnectedDigraph and IsSymmetricDigraph);