diff --git a/lib/src/json.cpp b/lib/src/json.cpp
index 70b5d138..3926d639 100644
--- a/lib/src/json.cpp
+++ b/lib/src/json.cpp
@@ -2634,7 +2634,7 @@ struct reader {
 
         if (auto* c_src = compo.children.try_to_get(src); c_src)
             if (auto* c_dst = compo.children.try_to_get(dst); c_dst)
-                if (not compo.connect(mod(), *c_src, p_src, *c_dst, p_dst))
+                if (compo.connect(mod(), *c_src, p_src, *c_dst, p_dst))
                     return true;
 
         report_json_error(error_id::modeling_connect_error);
diff --git a/lib/src/modeling-generic.cpp b/lib/src/modeling-generic.cpp
index 722c49e9..377843b9 100644
--- a/lib/src/modeling-generic.cpp
+++ b/lib/src/modeling-generic.cpp
@@ -139,7 +139,7 @@ status generic_component::connect([[maybe_unused]] const modeling& mod,
         return new_error(modeling::part::connections);
 
     if (src.type == child_type::model) {
-        if (src.type == child_type::model) {
+        if (dst.type == child_type::model) {
             if (not is_ports_compatible(
                   src.id.mdl_type, p_src.model, dst.id.mdl_type, p_dst.model))
                 return new_error(modeling::part::connections);