diff --git a/include/msidefs.h b/include/msidefs.h
index b99537f..cf022d6 100644
--- a/include/msidefs.h
+++ b/include/msidefs.h
@@ -168,6 +168,12 @@
     msidbComponentAttributes64bit = 0x00000100
 };
 
+enum msidbODBCDataSourceRegistration
+{
+    msidbODBCDataSourceRegistrationPerMachine = 0x00000000,
+    msidbODBCDataSourceRegistrationPerUser = 0x00000001
+};
+
 enum msidbRegistryRoot
 {
     msidbRegistryRootClassesRoot = 0,
diff --git a/include/odbcinst.h b/include/odbcinst.h
index f377197..a1109d5 100644
--- a/include/odbcinst.h
+++ b/include/odbcinst.h
@@ -34,6 +34,14 @@
 #define ODBC_CONFIG_DRIVER	3
 #define ODBC_CONFIG_DRIVER_MAX  100
 
+#define ODBC_ADD_DSN            1
+#define ODBC_CONFIG_DSN         2
+#define ODBC_REMOVE_DSN         3
+#define ODBC_ADD_SYS_DSN        4
+#define ODBC_CONFIG_SYS_DSN     5
+#define ODBC_REMOVE_SYS_DSN     6
+#define ODBC_REMOVE_DEFAULT_DSN 7
+
 /* Mode values for SQLSetConfigMode/SQLGetConfigMode */
 #define ODBC_BOTH_DSN 0
 #define ODBC_USER_DSN 1