diff --git a/lib/cascade.gi b/lib/cascade.gi
index df23efd0..2277bf70 100644
--- a/lib/cascade.gi
+++ b/lib/cascade.gi
@@ -78,8 +78,8 @@ function(list, numofdeps)
   local isgroup, type, comps, depdoms, vals, len, x, j, k, val, depfuncs, i;
 
   if not IsDenseList(list) then
-    Error("usage: <doms> should be a dense list of transformation semigroup\n",
-    " or permutation groups,");
+    Error("first argument should be a list of transformation semigroups\n",
+    " or permutation groups.");
     return;
   else
     isgroup:=true;
@@ -87,8 +87,8 @@ function(list, numofdeps)
       if not IsPermGroup(x) then
         isgroup:=false;
         if not IsTransformationSemigroup(x) then
-          Error("usage: <doms> should be a dense list of transformation",
-          " semigroup or permutation groups,");
+          Error("first argument should be a list of transformation\n",
+                "semigroups or permutation groups.");
           return;
         fi;
       fi;
diff --git a/tst/cascade.tst b/tst/cascade.tst
index d29da05b..052f5205 100644
--- a/tst/cascade.tst
+++ b/tst/cascade.tst
@@ -127,6 +127,14 @@ gap> for i in [1..333] do
 >   fi;
 > od;
 
+# RandomCascade error messages
+gap> RandomCascade(2,2);
+Error, first argument should be a list of transformation semigroups
+ or permutation groups.
+gap> RandomCascade([2],2);
+Error, first argument should be a list of transformation
+semigroups or permutation groups.
+
 #
 gap> c:=
 > Cascade( [ [ 1 .. 3 ], [ 1 .. 8 ], [ 1 .. 5 ] ],