-void gp2x_text_out8 (int x, int y, char *texto, ...);\r
-void gp2x_text_out15 (int x, int y, char *text);\r
-void gp2x_text_out8_2(int x, int y, char *texto, int color);\r
+void gp2x_text_out8 (int x, int y, const char *texto, ...);\r
+void gp2x_text_out15 (int x, int y, const char *text);\r
+void gp2x_text_out8_2(int x, int y, const char *texto, int color);\r