diff --git a/src/bin/e_zone.c b/src/bin/e_zone.c
index ebffe6182..38297183f 100644
--- a/src/bin/e_zone.c
+++ b/src/bin/e_zone.c
@@ -596,7 +596,7 @@ e_zone_flip_win_restore(void)
 }
 
 EAPI int
-e_zone_exec(E_Zone *zone, char *exe)
+e_zone_exec(E_Zone *zone, const char *exe)
 {
    int ret = 0;
    char *p1, *p2;
diff --git a/src/bin/e_zone.h b/src/bin/e_zone.h
index d70d566ce..32661d6ce 100644
--- a/src/bin/e_zone.h
+++ b/src/bin/e_zone.h
@@ -90,7 +90,7 @@ EAPI void       e_zone_desk_linear_flip_to(E_Zone *zone, int x);
 EAPI void       e_zone_flip_win_disable(void);
 EAPI void       e_zone_flip_win_restore(void);
 
-EAPI int        e_zone_exec(E_Zone *zone, char *exe);
+EAPI int        e_zone_exec(E_Zone *zone, const char *exe);
 EAPI int        e_zone_app_exec(E_Zone *zone, E_App *a);
 
 extern EAPI int E_EVENT_ZONE_DESK_COUNT_SET;