diff --git a/include/wx/expr.h b/include/wx/expr.h
index 52f45b9196..90c233795f 100644
--- a/include/wx/expr.h
+++ b/include/wx/expr.h
@@ -22,71 +22,6 @@
 #define alloca malloc
 #endif
 
-/* Rename all YACC/LEX stuff or we'll conflict with other
- * applications
- */
-
-#define yyback PROIO_yyback
-#define yylook PROIO_yylook
-#define yywrap PROIO_yywrap
-#define yyoutput PROIO_yyoutput
-#define yylex PROIO_yylex
-#define yyerror PROIO_yyerror
-#define yyleng PROIO_yyleng
-#define yytext PROIO_yytext
-#define yymorfg PROIO_yymorfg
-#define yylineno PROIO_yylineno
-#define yytchar PROIO_yytchar
-#define yyin PROIO_yyin
-#define yyout PROIO_yyout
-#define yysvf PROIO_yysvf
-#define yyestate PROIO_yyestate
-#define yysvec PROIO_yysvec
-#define yybgin PROIO_yybgin
-#define yyprevious PROIO_yyprevious
-#define yylhs PROIO_yylhs
-#define yylen PROIO_yylen
-#define yydefred PROIO_yydefred
-#define yydgoto PROIO_yydgoto
-#define yysindex PROIO_yysindex
-#define yyrindex PROIO_yyrindex
-#define yygindex PROIO_yygindex
-#define yytable PROIO_yytable
-#define yycheck PROIO_yycheck
-#define yyname PROIO_yyname
-#define yyrule PROIO_yyrule
-#define yydebug PROIO_yydebug
-#define yynerrs PROIO_yynerrs
-#define yyerrflag PROIO_yyerrflag
-#define yychar PROIO_yychar
-#define yyvsp PROIO_yyvsp
-#define yyssp PROIO_yyssp
-#define yyval PROIO_yyval
-#define yylval PROIO_yylval
-#define yyss PROIO_yyss
-#define yyvs PROIO_yyvs
-#define yyparse PROIO_yyparse
-
-/* +++steve162e: more defines necessary */
-#define yy_init_buffer PROIO_yy_init_buffer
-#define yy_create_buffer PROIO_yy_create_buffer
-#define yy_load_buffer_state PROIO_yy_load_buffer_state
-#define yyrestart PROIO_yyrestart
-#define yy_switch_to_buffer PROIO_yy_switch_to_buffer
-#define yy_delete_buffer PROIO_yy_delete_buffer
-/* ---steve162e */
-
-/* WG 1/96: still more for flex 2.5 */
-#define yy_scan_buffer PROIO_scan_buffer
-#define yy_scan_string PROIO_scan_string
-#define yy_scan_bytes PROIO_scan_bytes
-#define yy_flex_debug PROIO_flex_debug
-#define yy_flush_buffer PROIO_flush_buffer
-#if !defined(__VISAGECPP__)
-/* multiply defined??? */
-#define yyleng PROIO_yyleng
-#define yytext PROIO_yytext
-#endif
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/include/wx/wxexpr.h b/include/wx/wxexpr.h
index 18b53d0679..acad013bcf 100644
--- a/include/wx/wxexpr.h
+++ b/include/wx/wxexpr.h
@@ -50,9 +50,6 @@ typedef bool (*wxExprErrorHandler) (int errorType, char *msg);
 
 WXDLLEXPORT_DATA(extern wxExprErrorHandler) currentwxExprErrorHandler;
 
-extern "C" WXDLLEXPORT_DATA(FILE*) yyin;
-
-extern "C" WXDLLEXPORT int yyparse(void);
 
 typedef enum {
     wxExprNull,
diff --git a/src/common/wxexpr.cpp b/src/common/wxexpr.cpp
index 2abeffce01..6f67df37a2 100644
--- a/src/common/wxexpr.cpp
+++ b/src/common/wxexpr.cpp
@@ -33,6 +33,77 @@ extern "C" void LexFromFile(FILE *fd);
 extern "C" void LexFromString(char *buf);
 
 
+
+/* Rename all YACC/LEX stuff or we'll conflict with other
+ * applications
+ */
+
+#define yyback PROIO_yyback
+#define yylook PROIO_yylook
+#define yywrap PROIO_yywrap
+#define yyoutput PROIO_yyoutput
+#define yylex PROIO_yylex
+#define yyerror PROIO_yyerror
+#define yyleng PROIO_yyleng
+#define yytext PROIO_yytext
+#define yymorfg PROIO_yymorfg
+#define yylineno PROIO_yylineno
+#define yytchar PROIO_yytchar
+#define yyin PROIO_yyin
+#define yyout PROIO_yyout
+#define yysvf PROIO_yysvf
+#define yyestate PROIO_yyestate
+#define yysvec PROIO_yysvec
+#define yybgin PROIO_yybgin
+#define yyprevious PROIO_yyprevious
+#define yylhs PROIO_yylhs
+#define yylen PROIO_yylen
+#define yydefred PROIO_yydefred
+#define yydgoto PROIO_yydgoto
+#define yysindex PROIO_yysindex
+#define yyrindex PROIO_yyrindex
+#define yygindex PROIO_yygindex
+#define yytable PROIO_yytable
+#define yycheck PROIO_yycheck
+#define yyname PROIO_yyname
+#define yyrule PROIO_yyrule
+#define yydebug PROIO_yydebug
+#define yynerrs PROIO_yynerrs
+#define yyerrflag PROIO_yyerrflag
+#define yychar PROIO_yychar
+#define yyvsp PROIO_yyvsp
+#define yyssp PROIO_yyssp
+#define yyval PROIO_yyval
+#define yylval PROIO_yylval
+#define yyss PROIO_yyss
+#define yyvs PROIO_yyvs
+#define yyparse PROIO_yyparse
+
+/* +++steve162e: more defines necessary */
+#define yy_init_buffer PROIO_yy_init_buffer
+#define yy_create_buffer PROIO_yy_create_buffer
+#define yy_load_buffer_state PROIO_yy_load_buffer_state
+#define yyrestart PROIO_yyrestart
+#define yy_switch_to_buffer PROIO_yy_switch_to_buffer
+#define yy_delete_buffer PROIO_yy_delete_buffer
+/* ---steve162e */
+
+/* WG 1/96: still more for flex 2.5 */
+#define yy_scan_buffer PROIO_scan_buffer
+#define yy_scan_string PROIO_scan_string
+#define yy_scan_bytes PROIO_scan_bytes
+#define yy_flex_debug PROIO_flex_debug
+#define yy_flush_buffer PROIO_flush_buffer
+#if !defined(__VISAGECPP__)
+/* multiply defined??? */
+#define yyleng PROIO_yyleng
+#define yytext PROIO_yytext
+#endif
+
+extern "C" WXDLLEXPORT_DATA(FILE*) yyin;
+extern "C" WXDLLEXPORT int yyparse(void);
+
+
 wxExprDatabase *thewxExprDatabase = NULL;
 wxExprErrorHandler currentwxExprErrorHandler;