diff --git a/src-interface/processing.cpp b/src-interface/processing.cpp
index ebabdc3d9..3fc042b24 100644
--- a/src-interface/processing.cpp
+++ b/src-interface/processing.cpp
@@ -1,3 +1,4 @@
+#define SATDUMP_DLL_EXPORT2 1
 #include <filesystem>
 #include "processing.h"
 #include "logger.h"
@@ -72,8 +73,8 @@ namespace satdump
             processing_mutex.unlock();
         }
 
-        std::shared_ptr<std::vector<std::shared_ptr<ProcessingModule>>> ui_call_list = std::make_shared<std::vector<std::shared_ptr<ProcessingModule>>>();
-        std::shared_ptr<std::mutex> ui_call_list_mutex = std::make_shared<std::mutex>();
-        bool is_processing = false;
+        SATDUMP_DLL2 std::shared_ptr<std::vector<std::shared_ptr<ProcessingModule>>> ui_call_list = std::make_shared<std::vector<std::shared_ptr<ProcessingModule>>>();
+        SATDUMP_DLL2 std::shared_ptr<std::mutex> ui_call_list_mutex = std::make_shared<std::mutex>();
+        SATDUMP_DLL2 bool is_processing = false;
     }
 }
\ No newline at end of file
diff --git a/src-interface/processing.h b/src-interface/processing.h
index f95c43eae..4c75c05c9 100644
--- a/src-interface/processing.h
+++ b/src-interface/processing.h
@@ -3,14 +3,15 @@
 #include <mutex>
 #include <memory>
 #include "core/module.h"
+#include "dll_export.h"
 
 namespace satdump
 {
     namespace processing
     {
-        extern std::shared_ptr<std::vector<std::shared_ptr<ProcessingModule>>> ui_call_list;
-        extern std::shared_ptr<std::mutex> ui_call_list_mutex;
-        extern bool is_processing;
+        SATDUMP_DLL2 extern std::shared_ptr<std::vector<std::shared_ptr<ProcessingModule>>> ui_call_list;
+        SATDUMP_DLL2 extern std::shared_ptr<std::mutex> ui_call_list_mutex;
+        SATDUMP_DLL2 extern bool is_processing;
 
         void process(std::string downlink_pipeline,
                      std::string input_level,