diff --git a/library/debug.c b/library/debug.c
index 5522fb6..1c7eeb6 100644
--- a/library/debug.c
+++ b/library/debug.c
@@ -224,7 +224,7 @@
 }
 #endif /* POLARSSL_BIGNUM_C */
 
-#if defined(POLARSSL_X509_PARSE_C)
+#if defined(POLARSSL_X509_CRT_PARSE_C)
 static void debug_print_pk( const ssl_context *ssl, int level,
                             const char *file, int line,
                             const char *text, const pk_context *pk )
@@ -288,6 +288,6 @@
         crt = crt->next;
     }
 }
-#endif /* POLARSSL_X509_PARSE_C */
+#endif /* POLARSSL_X509_CRT_PARSE_C */
 
 #endif