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-rw-r--r--erts/emulator/beam/erl_driver.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/erts/emulator/beam/erl_driver.h b/erts/emulator/beam/erl_driver.h
index e71b87803b..1093366e08 100644
--- a/erts/emulator/beam/erl_driver.h
+++ b/erts/emulator/beam/erl_driver.h
@@ -687,8 +687,8 @@ EXTERN int driver_dl_close(void *);
EXTERN char *driver_dl_error(void);
/* environment */
-EXTERN int erl_drv_putenv(char *key, char *value);
-EXTERN int erl_drv_getenv(char *key, char *value, size_t *value_size);
+EXTERN int erl_drv_putenv(const char *key, char *value);
+EXTERN int erl_drv_getenv(const char *key, char *value, size_t *value_size);
#endif /* !ERL_DRIVER_TYPES_ONLY */