diff --git a/lib/libkse/thread/thr_cond.c b/lib/libkse/thread/thr_cond.c
index 8bf49bc155cb..b352ba3be3c9 100644
--- a/lib/libkse/thread/thr_cond.c
+++ b/lib/libkse/thread/thr_cond.c
@@ -152,6 +152,9 @@ _pthread_cond_destroy(pthread_cond_t *cond)
 		/* Unlock the condition variable structure: */
 		THR_LOCK_RELEASE(curthread, &cv->c_lock);
 
+		/* Free the cond lock structure: */
+		_lock_destroy(&cv->c_lock);
+
 		/*
 		 * Free the memory allocated for the condition
 		 * variable structure:
diff --git a/lib/libkse/thread/thr_mutex.c b/lib/libkse/thread/thr_mutex.c
index 2df59efee68d..8d0d76c01b5d 100644
--- a/lib/libkse/thread/thr_mutex.c
+++ b/lib/libkse/thread/thr_mutex.c
@@ -187,6 +187,8 @@ _pthread_mutex_init(pthread_mutex_t *mutex,
 				MUTEX_INIT_LINK(pmutex);
 				*mutex = pmutex;
 			} else {
+				/* Free the mutex lock structure: */
+				_lock_destroy(&pmutex->m_lock);
 				free(pmutex);
 				*mutex = NULL;
 			}
@@ -235,6 +237,10 @@ _pthread_mutex_destroy(pthread_mutex_t *mutex)
 			 * structure:
 			 */
 			MUTEX_ASSERT_NOT_OWNED(m);
+
+			/* Free the mutex lock structure: */
+			_lock_destroy(&m->m_lock);
+
 			free(m);
 		}
 	}
diff --git a/lib/libpthread/thread/thr_cond.c b/lib/libpthread/thread/thr_cond.c
index 8bf49bc155cb..b352ba3be3c9 100644
--- a/lib/libpthread/thread/thr_cond.c
+++ b/lib/libpthread/thread/thr_cond.c
@@ -152,6 +152,9 @@ _pthread_cond_destroy(pthread_cond_t *cond)
 		/* Unlock the condition variable structure: */
 		THR_LOCK_RELEASE(curthread, &cv->c_lock);
 
+		/* Free the cond lock structure: */
+		_lock_destroy(&cv->c_lock);
+
 		/*
 		 * Free the memory allocated for the condition
 		 * variable structure:
diff --git a/lib/libpthread/thread/thr_mutex.c b/lib/libpthread/thread/thr_mutex.c
index 2df59efee68d..8d0d76c01b5d 100644
--- a/lib/libpthread/thread/thr_mutex.c
+++ b/lib/libpthread/thread/thr_mutex.c
@@ -187,6 +187,8 @@ _pthread_mutex_init(pthread_mutex_t *mutex,
 				MUTEX_INIT_LINK(pmutex);
 				*mutex = pmutex;
 			} else {
+				/* Free the mutex lock structure: */
+				_lock_destroy(&pmutex->m_lock);
 				free(pmutex);
 				*mutex = NULL;
 			}
@@ -235,6 +237,10 @@ _pthread_mutex_destroy(pthread_mutex_t *mutex)
 			 * structure:
 			 */
 			MUTEX_ASSERT_NOT_OWNED(m);
+
+			/* Free the mutex lock structure: */
+			_lock_destroy(&m->m_lock);
+
 			free(m);
 		}
 	}