diff --git a/src/remake.jl b/src/remake.jl
index 35d96e9c79..4a88999e7c 100644
--- a/src/remake.jl
+++ b/src/remake.jl
@@ -356,10 +356,10 @@ function updated_u0(prob, u0, p)
         if length(u0) == length(state_values(prob))
             return u0
         else
-            throw(ArgumentError("Invalid value for u0: $u0. Must be an array of appropriate length or a symbolic map"))
+            throw(ArgumentError("Invalid value for u0: $u0. New length ($length(u0)) does not match length of current problem ($(length(state_values(prob))))"))
         end
     else
-        throw(ArgumentError("Invalid value for u0: $u0. Must be an array of appropriate length or a symbolic map"))
+        return u0
     end
     if !has_sys(prob.f)
         throw(ArgumentError("This problem does not support symbolic maps with" *