diff --git a/library/pkcs5.c b/library/pkcs5.c
index d620dc1..5d415ca 100644
--- a/library/pkcs5.c
+++ b/library/pkcs5.c
@@ -44,7 +44,7 @@
 
 #include "mbedtls/platform.h"
 
-#include "mbedtls/psa_util.h"
+#include "psa_util_internal.h"
 
 #if defined(MBEDTLS_ASN1_PARSE_C)
 static int pkcs5_parse_pbkdf2_params(const mbedtls_asn1_buf *params,