diff --git a/programs/fuzz/fuzz_x509csr.c b/programs/fuzz/fuzz_x509csr.c
index 39fb4cb..7c98557 100644
--- a/programs/fuzz/fuzz_x509csr.c
+++ b/programs/fuzz/fuzz_x509csr.c
@@ -11,6 +11,12 @@
     unsigned char buf[4096];
 
     mbedtls_x509_csr_init(&csr);
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_status_t status = psa_crypto_init();
+    if (status != PSA_SUCCESS) {
+        goto exit;
+    }
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
     ret = mbedtls_x509_csr_parse(&csr, Data, Size);
 #if !defined(MBEDTLS_X509_REMOVE_INFO)
     if (ret == 0) {
@@ -20,7 +26,9 @@
     ((void) ret);
     ((void) buf);
 #endif /* !MBEDTLS_X509_REMOVE_INFO */
+exit:
     mbedtls_x509_csr_free(&csr);
+    mbedtls_psa_crypto_free();
 #else
     (void) Data;
     (void) Size;