diff --git a/src/interfaces/odbc/multibyte.c b/src/interfaces/odbc/multibyte.c
index 06e24d0871634db274d70befd001b82addd0570e..11d35369ddf26f17baa1cdb2a8393697da4b4b84 100644
--- a/src/interfaces/odbc/multibyte.c
+++ b/src/interfaces/odbc/multibyte.c
@@ -15,6 +15,9 @@
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
+#ifndef	TRUE
+#define	TRUE	1
+#endif
 
 pg_CS CS_Table[] =
 {
diff --git a/src/interfaces/odbc/pgtypes.c b/src/interfaces/odbc/pgtypes.c
index 8cade89b73f9f87d55d51a8a98f0bbbe37e16f76..5b6f85fbc390352247aeab7b86300af6831446a0 100644
--- a/src/interfaces/odbc/pgtypes.c
+++ b/src/interfaces/odbc/pgtypes.c
@@ -1266,7 +1266,9 @@ ctype_length(Int2 ctype)
 
 		case SQL_C_BINARY:
 		case SQL_C_CHAR:
+#ifdef	UNICODE_SUPPORT
 		case SQL_C_WCHAR:
+#endif /* UNICODE_SUPPORT */
 			return 0;
 
 		default:				/* should never happen */