diff --git a/libc/bionic/libc_init_common.cpp b/libc/bionic/libc_init_common.cpp
index 48fd670..c22f571 100644
--- a/libc/bionic/libc_init_common.cpp
+++ b/libc/bionic/libc_init_common.cpp
@@ -261,6 +261,7 @@
     "LD_PROFILE",
     "LD_SHOW_AUXV",
     "LD_USE_LOAD_BIAS",
+    "LIBC_DEBUG_MALLOC_OPTIONS",
     "LOCALDOMAIN",
     "LOCPATH",
     "MALLOC_CHECK_",