diff --git a/src/Makefile b/src/Makefile
index 33cbb2c5..b5eaaf33 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -119,8 +119,9 @@ HEADERS_TO_INSTALL = \
   timestamp.h identity_list.h bloblist.h stringpair.h message.h mime.h group.h \
   cryptotech.h sync_api.h pEp_string.h openpgp_compat.h engine_sql.h \
   labeled_int_list.h key_reset.h base64.h sync_codec.h distribution_codec.h \
-  storage_codec.h status_to_string.h keyreset_command.h platform.h \
-  platform_unix.h platform_windows.h platform_zos.h \
+  storage_codec.h status_to_string.h keyreset_command.h \
+  map_asn1.h \
+  platform.h platform_unix.h platform_windows.h platform_zos.h \
   transport.h growing_buf.h $(wildcard ../asn.1/*.h)
 
 # CAVEAT:
diff --git a/src/map_asn1.c b/src/map_asn1.c
index cf643121..0baa7503 100644
--- a/src/map_asn1.c
+++ b/src/map_asn1.c
@@ -837,6 +837,7 @@ enomem:
     return NULL;
 }
 
+DYNAMIC_API
 ASN1Message_t *ASN1Message_from_message(
         message *msg,
         ASN1Message_t *result,
@@ -1078,6 +1079,7 @@ enomem:
     return NULL;
 }
 
+DYNAMIC_API
 message *ASN1Message_to_message(
         ASN1Message_t *msg,
         message *result,
diff --git a/src/map_asn1.h b/src/map_asn1.h
index 83ac8c3f..47cff5c3 100644
--- a/src/map_asn1.h
+++ b/src/map_asn1.h
@@ -346,6 +346,7 @@ bloblist_t *PBlobList_to_bloblist(
  *  
  */
 
+DYNAMIC_API
 ASN1Message_t *ASN1Message_from_message(
         message *msg,
         ASN1Message_t *result,
@@ -371,6 +372,7 @@ ASN1Message_t *ASN1Message_from_message(
  *  
  */
 
+DYNAMIC_API
 message *ASN1Message_to_message(
         ASN1Message_t *msg,
         message *result,