diff --git a/include/mbedtls/asn1.h b/include/mbedtls/asn1.h
index ff019f4..d8ee469 100644
--- a/include/mbedtls/asn1.h
+++ b/include/mbedtls/asn1.h
@@ -198,7 +198,7 @@
 mbedtls_asn1_named_data;
 
 #if defined(MBEDTLS_ASN1_PARSE_C) || defined(MBEDTLS_X509_CREATE_C) || \
-    defined(MBEDTLS_PSA_UTIL_HAVE_ECDSA)
+    defined(MBEDTLS_PSA_UTIL_HAVE_ECDSA) || defined(MBEDTLS_PEM_PARSE_C)
 /**
  * \brief       Get the length of an ASN.1 element.
  *              Updates the pointer to immediately behind the length.
@@ -245,7 +245,8 @@
 int mbedtls_asn1_get_tag(unsigned char **p,
                          const unsigned char *end,
                          size_t *len, int tag);
-#endif /* MBEDTLS_ASN1_PARSE_C || MBEDTLS_X509_CREATE_C || MBEDTLS_PSA_UTIL_HAVE_ECDSA */
+#endif /* MBEDTLS_ASN1_PARSE_C || MBEDTLS_X509_CREATE_C ||
+          MBEDTLS_PSA_UTIL_HAVE_ECDSA || MBEDTLS_PEM_PARSE_C */
 
 #if defined(MBEDTLS_ASN1_PARSE_C)
 /**