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-rw-r--r--stdlib/stdlib.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index ba5a231abf..be778edfe4 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -337,6 +337,9 @@ extern int putenv __P ((__const char *__string));
If REPLACE is nonzero, overwrite an existing value. */
extern int setenv __P ((__const char *__name, __const char *__value,
int __replace));
+
+/* Remove the variable NAME from the environment. */
+extern void unsetenv __P ((__const char *__name));
#endif
/* Execute the given line as a shell command. */