diff --git a/src/parameter_indexing.jl b/src/parameter_indexing.jl
index d7b73cf..5f9ed12 100644
--- a/src/parameter_indexing.jl
+++ b/src/parameter_indexing.jl
@@ -161,7 +161,6 @@ function _getp(sys, ::ScalarSymbolic, ::SymbolicTypeTrait, p)
     idx = parameter_index(sys, p)
     return invoke(_getp, Tuple{Any, NotSymbolic, NotSymbolic, Any},
         sys, NotSymbolic(), NotSymbolic(), idx)
-    return _getp(sys, NotSymbolic(), NotSymbolic(), idx)
 end
 
 for (t1, t2) in [
@@ -229,6 +228,11 @@ for (t1, t2) in [
 end
 
 function _getp(sys, ::ArraySymbolic, ::NotSymbolic, p)
+    if is_parameter(sys, p)
+        idx = parameter_index(sys, p)
+        return invoke(_getp, Tuple{Any, NotSymbolic, NotSymbolic, Any},
+            sys, NotSymbolic(), NotSymbolic(), idx)
+    end
     return getp(sys, collect(p))
 end
 
@@ -294,5 +298,9 @@ for (t1, t2) in [
 end
 
 function _setp(sys, ::ArraySymbolic, ::NotSymbolic, p)
+    if is_parameter(sys, p)
+        idx = parameter_index(sys, p)
+        return setp(sys, idx; run_hook = false)
+    end
     return setp(sys, collect(p); run_hook = false)
 end
diff --git a/src/state_indexing.jl b/src/state_indexing.jl
index 782fc7b..0229f42 100644
--- a/src/state_indexing.jl
+++ b/src/state_indexing.jl
@@ -239,6 +239,12 @@ for (t1, t2) in [
 end
 
 function _getu(sys, ::ArraySymbolic, ::NotSymbolic, sym)
+    if is_variable(sys, sym)
+        idx = variable_index(sys, sym)
+        return getu(sys, idx)
+    elseif is_parameter(sys, sym)
+        return getp(sys, sym)
+    end
     return getu(sys, collect(sym))
 end
 
@@ -295,5 +301,11 @@ for (t1, t2) in [
 end
 
 function _setu(sys, ::ArraySymbolic, ::NotSymbolic, sym)
+    if is_variable(sys, sym)
+        idx = variable_index(sys, sym)
+        return setu(sys, idx)
+    elseif is_parameter(sys, sym)
+        return setp(sys, sym)
+    end
     return setu(sys, collect(sym))
 end