diff --git a/src/fhn_solver.jl b/src/fhn_solver.jl
index f428f6d..b337d4e 100644
--- a/src/fhn_solver.jl
+++ b/src/fhn_solver.jl
@@ -16,7 +16,7 @@ using .Laplacian
     # Arguments:
     `U`: activator matrix
     `V`: inhibitor matrix
-    `param_obs`: used parameters from FHNParams
+    `param_obs`: used parameters from CombinedPDEParams
     `dx`: dx
     `dt`: dt
 """
diff --git a/src/gray_scott_solver.jl b/src/gray_scott_solver.jl
index d4b7130..7c5e530 100644
--- a/src/gray_scott_solver.jl
+++ b/src/gray_scott_solver.jl
@@ -14,7 +14,7 @@ using .Laplacian
     # Arguments:
     `U`: activator matrix
     `V`: inhibitor matrix
-    `param_obs`: used parameters from FHNParams
+    `param_obs`: used parameters from CombinedPDEParams
     `dx`: dx
 """
 function step_gray_scott!(U, V, params_obs::Observable; dx=1)