diff --git a/wolfssl/wolfcrypt/port/atmel/atmel.h b/wolfssl/wolfcrypt/port/atmel/atmel.h
index 5e4c2777d..6413647e8 100644
--- a/wolfssl/wolfcrypt/port/atmel/atmel.h
+++ b/wolfssl/wolfcrypt/port/atmel/atmel.h
@@ -115,15 +115,15 @@ int  atmel_ecc_verify(const byte* message, const byte* signature,
 #endif /* WOLFSSL_ATECC508A */
 
 #ifdef HAVE_PK_CALLBACKS
-    int atcatls_create_key_cb(WOLFSSL* ssl, ecc_key* key, unsigned int keySz,
+    int atcatls_create_key_cb(struct WOLFSSL* ssl, struct ecc_key* key, unsigned int keySz,
         int ecc_curve, void* ctx);
-    int atcatls_create_pms_cb(WOLFSSL* ssl, ecc_key* otherKey,
+    int atcatls_create_pms_cb(struct WOLFSSL* ssl, struct ecc_key* otherKey,
         unsigned char* pubKeyDer, word32* pubKeySz,
         unsigned char* out, word32* outlen,
         int side, void* ctx);
-    int atcatls_sign_certificate_cb(WOLFSSL* ssl, const byte* in, unsigned int inSz,
+    int atcatls_sign_certificate_cb(struct WOLFSSL* ssl, const byte* in, unsigned int inSz,
         byte* out, word32* outSz, const byte* key, unsigned int keySz, void* ctx);
-    int atcatls_verify_signature_cb(WOLFSSL* ssl, const byte* sig, unsigned int sigSz,
+    int atcatls_verify_signature_cb(struct WOLFSSL* ssl, const byte* sig, unsigned int sigSz,
         const byte* hash, unsigned int hashSz, const byte* key, unsigned int keySz,
         int* result, void* ctx);