diff --git a/library/x509_crt.c b/library/x509_crt.c
index 191c886..38e69cc 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -37,11 +37,10 @@
 #include MBEDTLS_CONFIG_FILE
 #endif
 
-#include "mbedtls/error.h"
-
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
 
 #include "mbedtls/x509_crt.h"
+#include "mbedtls/error.h"
 #include "mbedtls/oid.h"
 #include "mbedtls/platform_util.h"