diff --git a/Project.toml b/Project.toml
index ebffc74..6a8282d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,6 +1,6 @@
 name = "Libwebsockets"
 uuid = "30a1cee6-c274-443c-b274-d8ea34e8f87d"
-version = "1.0.1"
+version = "1.0.2"
 
 [deps]
 libwebsockets_jll = "b6b84edf-6aef-5ff6-9b66-656961a84a09"
diff --git a/src/functions.jl b/src/functions.jl
index 2265368..3469061 100644
--- a/src/functions.jl
+++ b/src/functions.jl
@@ -284,7 +284,7 @@ function lws_ext_parse_options(ext, wsi, ext_user, opts, o, len)
 end
 
 function lws_extension_callback_pm_deflate(context, ext, wsi, reason, user, in, len)
-    ccall((:lws_extension_callback_pm_deflate, libwebsockets), Cint, (Ptr{LwsContext}, Ptr{LwsExtension}, Ptr{Lws}, Cuint, Ptr{Cvoid}, Ptr{Cvoid}, Csize_t), context, ext, wsi, reason, user, in, len)
+    ccall((:lws_extension_callback_pm_deflate, libwebsockets), Cint, (Ptr{LwsContext}, Ptr{LwsExtension}, Ptr{Lws}, Cint, Ptr{Cvoid}, Ptr{Cvoid}, Csize_t), context, ext, wsi, reason, user, in, len)
 end
 
 function lws_vhost_name_to_protocol(vh, name)
diff --git a/src/types.jl b/src/types.jl
index 5040b0a..ae34c5b 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -106,7 +106,7 @@ Base.@kwdef mutable struct LwsExtOptionArg
     len::Cint = 0
 end
 
-Base.@kwdef mutable struct LwsExtension
+Base.@kwdef struct LwsExtension
     name::Ptr{Cchar} = C_NULL
     callback::Ptr{Cvoid} = C_NULL
     client_offer::Ptr{Cchar} = C_NULL