diff --git a/sys/compat/freebsd32/freebsd32.h b/sys/compat/freebsd32/freebsd32.h
index a3774c99a0cb..46ba54c1971d 100644
--- a/sys/compat/freebsd32/freebsd32.h
+++ b/sys/compat/freebsd32/freebsd32.h
@@ -94,6 +94,27 @@ struct itimerval32 {
 	struct timeval32 it_value;
 };
 
+struct umtx_time32 {
+	struct	timespec32	_timeout;
+	uint32_t		_flags;
+	uint32_t		_clockid;
+};
+
+struct umtx_robust_lists_params_compat32 {
+	uint32_t	robust_list_offset;
+	uint32_t	robust_priv_list_offset;
+	uint32_t	robust_inact_offset;
+};
+
+struct umutex32 {
+	volatile __lwpid_t	m_owner;	/* Owner of the mutex */
+	__uint32_t		m_flags;	/* Flags of the mutex */
+	__uint32_t		m_ceilings[2];	/* Priority protect ceiling */
+	__uint32_t		m_rb_lnk;	/* Robust linkage */
+	__uint32_t		m_pad;
+	__uint32_t		m_spare[2];
+};
+
 #define FREEBSD4_MFSNAMELEN	16
 #define FREEBSD4_MNAMELEN	(88 - 2 * sizeof(int32_t))
 
diff --git a/sys/kern/kern_umtx.c b/sys/kern/kern_umtx.c
index 9e0a38709ce3..784c10cb97ac 100644
--- a/sys/kern/kern_umtx.c
+++ b/sys/kern/kern_umtx.c
@@ -232,27 +232,6 @@ struct umtx_copyops {
 	const bool	compat32;
 };
 
-struct umtx_time32 {
-	struct	timespec32	_timeout;
-	uint32_t		_flags;
-	uint32_t		_clockid;
-};
-
-struct umtx_robust_lists_params_compat32 {
-	uint32_t	robust_list_offset;
-	uint32_t	robust_priv_list_offset;
-	uint32_t	robust_inact_offset;
-};
-
-struct umutex32 {
-	volatile __lwpid_t	m_owner;	/* Owner of the mutex */
-	__uint32_t		m_flags;	/* Flags of the mutex */
-	__uint32_t		m_ceilings[2];	/* Priority protect ceiling */
-	__uint32_t		m_rb_lnk;	/* Robust linkage */
-	__uint32_t		m_pad;
-	__uint32_t		m_spare[2];
-};
-
 _Static_assert(sizeof(struct umutex) == sizeof(struct umutex32), "umutex32");
 _Static_assert(__offsetof(struct umutex, m_spare[0]) ==
     __offsetof(struct umutex32, m_spare[0]), "m_spare32");