diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index a32b4bc..f896850 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -6,6 +6,7 @@
     x509_crl.c
     x509_crt.c
     x509_csr.c
+    x509_oid.c
     x509write.c
     x509write_crt.c
     x509write_csr.c
diff --git a/library/Makefile b/library/Makefile
index 1c0e4d9..fb61911 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -198,6 +198,7 @@
 	   x509_crl.o \
 	   x509_crt.o \
 	   x509_csr.o \
+	   x509_oid.o \
 	   x509write.o \
 	   x509write_crt.o \
 	   x509write_csr.o \
diff --git a/library/x509_oid.c b/library/x509_oid.c
index 7bbe4d5..6fe6e70 100644
--- a/library/x509_oid.c
+++ b/library/x509_oid.c
@@ -7,7 +7,7 @@
  *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
  */
 
-#include "common.h"
+#include "x509_internal.h"
 
 #if defined(MBEDTLS_OID_C)