diff --git a/src/openrct2/audio/AudioMixer.h b/src/openrct2/audio/AudioMixer.h
index 7a280ac091..f3cf76a018 100644
--- a/src/openrct2/audio/AudioMixer.h
+++ b/src/openrct2/audio/AudioMixer.h
@@ -16,7 +16,13 @@
 
 #pragma once
 
-#include "../common.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+    #include "../common.h"
+#ifdef __cplusplus
+}
+#endif
 
 #define MIXER_VOLUME_MAX        128
 #define MIXER_LOOP_NONE         0
diff --git a/src/openrct2/object/ObjectManager.h b/src/openrct2/object/ObjectManager.h
index 7df24b6bcf..2ee35a1375 100644
--- a/src/openrct2/object/ObjectManager.h
+++ b/src/openrct2/object/ObjectManager.h
@@ -20,12 +20,12 @@
     #include <vector>
 #endif
 
-#include "../common.h"
 
 #ifdef __cplusplus
 extern "C"
 {
 #endif
+    #include "../common.h"
     #include "../object.h"
 #ifdef __cplusplus
 }