diff --git a/sudo.c b/sudo.c
index 03d98488f..b757cc359 100644
--- a/sudo.c
+++ b/sudo.c
@@ -292,7 +292,7 @@ void clean_envp(envp)
 	if (strncmp("LD_", *envp, 3) && strncmp("SHLIB_PATH", *envp, 10))
 #else
 #ifdef __alpha
-	if (strncmp("LD_", *envp, 3) && strncmp("_RLD_ROOT", *envp, 9))
+	if (strncmp("LD_", *envp, 3) && strncmp("_RLD_", *envp, 5))
 #else
 	if (strncmp("LD_", *envp, 3))
 #endif /* __alpha */