diff --git a/libobs/util/c99defs.h b/libobs/util/c99defs.h
index 995e179d3..e74fb1053 100644
--- a/libobs/util/c99defs.h
+++ b/libobs/util/c99defs.h
@@ -50,7 +50,7 @@
 #ifdef _MSC_VER
 #define EXPORT __declspec(dllexport)
 #else
-#define EXPORT
+#define EXPORT __attribute__((visibility("default")))
 #endif
 
 #include <stddef.h>
diff --git a/plugins/obs-outputs/CMakeLists.txt b/plugins/obs-outputs/CMakeLists.txt
index 124df673f..cde40922f 100644
--- a/plugins/obs-outputs/CMakeLists.txt
+++ b/plugins/obs-outputs/CMakeLists.txt
@@ -96,9 +96,11 @@ if(ENABLE_RTMPS STREQUAL "AUTO" OR ENABLE_RTMPS STREQUAL "ON")
       target_link_libraries(obs-outputs PRIVATE ${FOUNDATION_FRAMEWORK}
                                                 ${SECURITY_FRAMEWORK})
       set_target_properties(obs-outputs PROPERTIES CXX_VISIBILITY_PRESET hidden)
+      set_target_properties(obs-outputs PROPERTIES C_VISIBILITY_PRESET hidden)
 
     elseif(OS_POSIX)
       set_target_properties(obs-outputs PROPERTIES CXX_VISIBILITY_PRESET hidden)
+      set_target_properties(obs-outputs PROPERTIES C_VISIBILITY_PRESET hidden)
     endif()
   endif()
 else()