diff --git a/library/x509_crt.c b/library/x509_crt.c
index a783b18..b3bcdaf 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -46,7 +46,7 @@
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
 #include "psa/crypto.h"
-#include "mbedtls/psa_util.h"
+#include "psa_util_internal.h"
 #include "md_psa.h"
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 #include "pk_internal.h"