1 files changed, 8 insertions, 2 deletions

diff --git a/lib/libc/stdlib/getenv.c b/lib/libc/stdlib/getenv.c
index b7826d72a5d4..47963d53dd62 100644
--- a/lib/libc/stdlib/getenv.c
+++ b/lib/libc/stdlib/getenv.c
@@ -662,6 +662,7 @@ unsetenv(const char *name)
 {
 	int envNdx;
 	size_t nameLen;
+	int newEnvActive;
 
 	/* Check for malformed name. */
 	if (name == NULL || (nameLen = __strleneq(name)) == 0) {
@@ -674,13 +675,18 @@ unsetenv(const char *name)
 		return (-1);
 
 	/* Deactivate specified variable. */
+	/* Remove all occurrences. */
 	envNdx = envVarsTotal - 1;
-	if (__findenv(name, nameLen, &envNdx, true) != NULL) {
+	newEnvActive = envActive;
+	while (__findenv(name, nameLen, &envNdx, true) != NULL) {
 		envVars[envNdx].active = false;
 		if (envVars[envNdx].putenv)
 			__remove_putenv(envNdx);
-		__rebuild_environ(envActive - 1);
+		envNdx--;
+		newEnvActive--;
 	}
+	if (newEnvActive != envActive)
+		__rebuild_environ(newEnvActive);
 
 	return (0);
 }