diff --git a/library/pkcs12.c b/library/pkcs12.c
index c603a13..5e8b287 100644
--- a/library/pkcs12.c
+++ b/library/pkcs12.c
@@ -52,6 +52,8 @@
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
+#if defined(MBEDTLS_ASN1_PARSE_C)
+
 static int pkcs12_parse_pbe_params( mbedtls_asn1_buf *params,
                                     mbedtls_asn1_buf *salt, int *iterations )
 {
@@ -230,6 +232,8 @@
     return( ret );
 }
 
+#endif /* MBEDTLS_ASN1_PARSE_C */
+
 static void pkcs12_fill_buffer( unsigned char *data, size_t data_len,
                                 const unsigned char *filler, size_t fill_len )
 {