diff --git a/src/source_package_publishing_history.cpp b/src/source_package_publishing_history.cpp
index 893cdea..67ab538 100644
--- a/src/source_package_publishing_history.cpp
+++ b/src/source_package_publishing_history.cpp
@@ -17,6 +17,7 @@
 #include "binary_package_publishing_history.h"
 #include "build.h"
 #include "launchpad.h"
+#include "distro_series.h"
 #include <iostream>
 #include <nlohmann/json.hpp>
 
@@ -26,7 +27,7 @@ source_package_publishing_history::source_package_publishing_history()
       self_link(""),
       distro_series_link(""),
       lp(nullptr),
-      distro_series([this]() -> std::optional<class distro_series> {
+      distro_series([this]() -> std::optional<::distro_series> {
           if (distro_series_link.empty()) return std::nullopt;
           if (_distro_series) return _distro_series;
 
@@ -34,7 +35,7 @@ source_package_publishing_history::source_package_publishing_history()
           if (!response) return std::nullopt;
 
           auto data = nlohmann::json::parse(response.value());
-          auto ds = distro_series::parse(data.dump());
+          auto ds = ::distro_series::parse(data.dump());
 
           if (ds) {
               ds->set_lp(lp);
diff --git a/src/source_package_publishing_history.h b/src/source_package_publishing_history.h
index e382d8e..4f33812 100644
--- a/src/source_package_publishing_history.h
+++ b/src/source_package_publishing_history.h
@@ -43,7 +43,7 @@ public:
     void parse_json(const std::string& json_data);
 
     std::generator<build> getBuilds() const;
-    lazy_optional<class distro_series, std::function<std::optional<class distro_series>()>> distro_series;
+    lazy_optional<::distro_series, std::function<std::optional<::distro_series>()>> distro_series;
     std::generator<binary_package_publishing_history> getPublishedBinaries(bool active_binaries_only = false) const;
 
     bool requestDeletion(const std::string& removal_comment = "");
@@ -58,7 +58,7 @@ public:
 
 private:
     launchpad* lp;
-    std::optional<class distro_series> _distro_series = std::nullopt;
+    std::optional<::distro_series> _distro_series = std::nullopt;
 };
 
 #endif // SOURCE_PACKAGE_PUBLISHING_HISTORY