diff --git a/src/modules/tls/tls_init.c b/src/modules/tls/tls_init.c
index e4a19d6ddad..7824245813b 100644
--- a/src/modules/tls/tls_init.c
+++ b/src/modules/tls/tls_init.c
@@ -69,20 +69,31 @@ static int tls_mod_preinitialized = 0;
 static int tls_mod_initialized = 0;
 
 extern int ksr_tls_init_mode;
-pthread_mutex_t ksr_tls_lock_shm;
+static pthread_mutex_t *ksr_tls_lock_shm = NULL;
 
 /**
  *
  */
 int ksr_tls_lock_init(void)
 {
+	pthread_mutexattr_t attr;
+
 	if(!(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)) {
 		return 0;
 	}
-	if(pthread_mutex_init(&ksr_tls_lock_shm, NULL) != 0) {
+	ksr_tls_lock_shm = (pthread_mutex_t *)shm_mallocxz(sizeof(pthread_mutex_t));
+	if(ksr_tls_lock_shm == NULL) {
+		LM_ERR("mutex allocation failed\n");
+		return -1;
+	}
+	pthread_mutexattr_init(&attr);
+	pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+	if(pthread_mutex_init(ksr_tls_lock_shm, &attr) != 0) {
+		pthread_mutexattr_destroy(&attr);
 		LM_ERR("mutex init failed\n");
 		return -1;
 	}
+	pthread_mutexattr_destroy(&attr);
 	return 0;
 }
 
@@ -94,7 +105,8 @@ void ksr_tls_lock_destroy(void)
 	if(!(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)) {
 		return;
 	}
-	pthread_mutex_destroy(&ksr_tls_lock_shm);
+	pthread_mutex_destroy(ksr_tls_lock_shm);
+	shm_free(ksr_tls_lock_shm);
 	return;
 }
 
@@ -248,7 +260,7 @@ static void *ser_malloc(size_t size, const char *file, int line)
 #endif
 
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 
 #ifdef RAND_NULL_MALLOC
 	/* start random null returns only after
@@ -277,7 +289,7 @@ static void *ser_malloc(size_t size, const char *file, int line)
 	}
 #endif
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 	return p;
 }
 
@@ -292,7 +304,7 @@ static void *ser_realloc(void *ptr, size_t size, const char *file, int line)
 #endif
 
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 
 #ifdef RAND_NULL_MALLOC
 	/* start random null returns only after
@@ -322,7 +334,7 @@ static void *ser_realloc(void *ptr, size_t size, const char *file, int line)
 #endif
 
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 
 	return p;
 }
@@ -330,12 +342,12 @@ static void *ser_realloc(void *ptr, size_t size, const char *file, int line)
 static void ser_free(void *ptr, const char *fname, int fline)
 {
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	if(ptr) {
 		shm_free(ptr);
 	}
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 }
 
 #endif /* LIBRESSL_VERSION_NUMBER */
@@ -350,10 +362,10 @@ static void *ser_malloc(size_t size)
 	void *p;
 
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	p = shm_malloc(size);
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 	return p;
 }
 
@@ -362,10 +374,10 @@ static void *ser_realloc(void *ptr, size_t size)
 {
 	void *p;
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	p = shm_realloc(ptr, size);
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 	return p;
 }
 #else
@@ -373,10 +385,10 @@ static void *ser_malloc(size_t size, const char *fname, int fline)
 {
 	void *p;
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	p = shm_malloc(size);
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 	return p;
 }
 
@@ -385,10 +397,10 @@ static void *ser_realloc(void *ptr, size_t size, const char *fname, int fline)
 {
 	void *p;
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	p = shm_realloc(ptr, size);
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 	return p;
 }
 #endif
@@ -406,23 +418,23 @@ static void ser_free(void *ptr)
 	 * here in the wrapper function.
 	 */
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	if(ptr) {
 		shm_free(ptr);
 	}
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 }
 #else
 static void ser_free(void *ptr, const char *fname, int fline)
 {
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_lock(&ksr_tls_lock_shm);
+		pthread_mutex_lock(ksr_tls_lock_shm);
 	if(ptr) {
 		shm_free(ptr);
 	}
 	if(ksr_tls_init_mode & TLS_MODE_PTHREAD_LOCK_SHM)
-		pthread_mutex_unlock(&ksr_tls_lock_shm);
+		pthread_mutex_unlock(ksr_tls_lock_shm);
 }
 #endif
 
diff --git a/src/modules/tls/tls_mod.c b/src/modules/tls/tls_mod.c
index c966e34b6f8..3a047769ca4 100644
--- a/src/modules/tls/tls_mod.c
+++ b/src/modules/tls/tls_mod.c
@@ -402,10 +402,6 @@ static int mod_init(void)
 	if(tls_check_sockets(*tls_domains_cfg) < 0)
 		goto error;
 
-	if(ksr_tls_lock_init() < 0) {
-		goto error;
-	}
-
 	LM_INFO("use OpenSSL version: %08x\n", (uint32_t)(OPENSSL_VERSION_NUMBER));
 #ifndef OPENSSL_NO_ECDH
 	LM_INFO("With ECDH-Support!\n");
@@ -674,6 +670,10 @@ int mod_register(char *path, int *dlflags, void *p1, void *p2)
 	if(!shm_initialized() && init_shm() < 0)
 		return -1;
 
+	if(ksr_tls_lock_init() < 0) {
+		return -1;
+	}
+
 	if(tls_pre_init() < 0)
 		return -1;