diff --git a/src/debug.cpp b/src/debug.cpp
index 24d4598b98..8bb3332052 100644
--- a/src/debug.cpp
+++ b/src/debug.cpp
@@ -18,6 +18,9 @@
 #include "thread.h"
 #include <array>
 #include <mutex>
+#if defined(__MINGW32__)
+#include "3rdparty/mingw-std-threads/mingw.mutex.h"
+#endif
 
 #if defined(_WIN32)
 #include "os/windows/win32.h"
diff --git a/src/music/fluidsynth.cpp b/src/music/fluidsynth.cpp
index 1c4b67e12b..38f65e7e14 100644
--- a/src/music/fluidsynth.cpp
+++ b/src/music/fluidsynth.cpp
@@ -16,6 +16,9 @@
 #include <fluidsynth.h>
 #include "../mixer.h"
 #include <mutex>
+#if defined(__MINGW32__)
+#include "3rdparty/mingw-std-threads/mingw.mutex.h"
+#endif
 
 static struct {
 	fluid_settings_t *settings;    ///< FluidSynth settings handle