diff --git a/CMakeLists.txt b/CMakeLists.txt
index 32ec82a..7bd4297 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,6 +35,7 @@ set(TPM_SOURCES
     src/tpm2_tis.c
     src/tpm2_winapi.c
     src/tpm2_wrap.c
+    src/tpm2_asn.c
     src/tpm2_cryptocb.c
     hal/tpm_io.c
     )
diff --git a/src/tpm2_asn.c b/src/tpm2_asn.c
index 2d67c44..c442b05 100644
--- a/src/tpm2_asn.c
+++ b/src/tpm2_asn.c
@@ -19,7 +19,6 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
  */
 
-#ifndef WOLFTPM2_NO_ASN
 #ifdef HAVE_CONFIG_H
     #include <config.h>
 #endif
@@ -27,6 +26,7 @@
 #include <wolftpm/tpm2_wrap.h>
 #include <wolftpm/tpm2_asn.h>
 
+#ifndef WOLFTPM2_NO_ASN
 #ifndef WOLFTPM2_NO_WRAPPER
 
 int TPM2_ASN_GetLength_ex(const uint8_t* input, word32* inOutIdx, int* len,
diff --git a/wolftpm/tpm2_asn.h b/wolftpm/tpm2_asn.h
index a7a6620..65a07e1 100644
--- a/wolftpm/tpm2_asn.h
+++ b/wolftpm/tpm2_asn.h
@@ -22,10 +22,6 @@
 #ifndef WOLFTPM_TPM2_ASN_H
 #define WOLFTPM_TPM2_ASN_H
 
-#ifdef HAVE_CONFIG_H
-    #include <config.h>
-#endif
-
 #include <wolftpm/tpm2.h>
 #include <wolftpm/tpm2_types.h>