diff -rupN --no-dereference glibmm-2.66.7/glib/src/threads.hg glibmm-2.66.7-new/glib/src/threads.hg
--- glibmm-2.66.7/glib/src/threads.hg	2024-03-22 13:50:47.000000000 +0100
+++ glibmm-2.66.7-new/glib/src/threads.hg	2024-03-26 10:57:24.702344737 +0100
@@ -197,7 +197,7 @@ class GLIBMM_API Thread::Exit
  *
  * @deprecated Please use std::thread instead.
  */
-Thread* wrap(GThread* gobject);
+Thread* GLIBMM_API wrap(GThread* gobject);
 
 /** Represents a mutex (mutual exclusion).
  * It can be used to protect data against shared access.  Try to use
@@ -297,7 +297,7 @@ private:
  *
  * @relates Glib::Threads::Mutex
  */
-Mutex* wrap(GMutex* gobject);
+Mutex* GLIBMM_API wrap(GMutex* gobject);
 
 /** This represents a recursive mutex.
  * It is similar to a Mutex with the difference
@@ -365,7 +365,7 @@ private:
  *
  * @relates Glib::Threads::RecMutex
  */
-RecMutex* wrap(GRecMutex* gobject);
+RecMutex* GLIBMM_API wrap(GRecMutex* gobject);
 
 /** This represents a reader-writer lock.
  * It is similar to a Mutex in that it allows
diff -rupN --no-dereference glibmm-2.66.7/untracked/glib/glibmm/threads.h glibmm-2.66.7-new/untracked/glib/glibmm/threads.h
--- glibmm-2.66.7/untracked/glib/glibmm/threads.h	2024-03-22 13:51:59.532378000 +0100
+++ glibmm-2.66.7-new/untracked/glib/glibmm/threads.h	2024-03-26 10:57:24.702344737 +0100
@@ -226,7 +226,7 @@ class GLIBMM_API Thread::Exit
  *
  * @deprecated Please use std::thread instead.
  */
-Thread* wrap(GThread* gobject);
+Thread* GLIBMM_API wrap(GThread* gobject);
 
 /** Represents a mutex (mutual exclusion).
  * It can be used to protect data against shared access.  Try to use
@@ -326,7 +326,7 @@ private:
  *
  * @relates Glib::Threads::Mutex
  */
-Mutex* wrap(GMutex* gobject);
+Mutex* GLIBMM_API wrap(GMutex* gobject);
 
 /** This represents a recursive mutex.
  * It is similar to a Mutex with the difference
@@ -394,7 +394,7 @@ private:
  *
  * @relates Glib::Threads::RecMutex
  */
-RecMutex* wrap(GRecMutex* gobject);
+RecMutex* GLIBMM_API wrap(GRecMutex* gobject);
 
 /** This represents a reader-writer lock.
  * It is similar to a Mutex in that it allows