diff --git a/include/mbedtls/threading.h b/include/mbedtls/threading.h
index aeea5d0..d45d613 100644
--- a/include/mbedtls/threading.h
+++ b/include/mbedtls/threading.h
@@ -42,7 +42,7 @@
 
 #if defined(MBEDTLS_THREADING_PTHREAD)
 #include <pthread.h>
-typedef struct
+typedef struct mbedtls_threading_mutex_t
 {
     pthread_mutex_t mutex;
     char is_valid;