diff --git a/libc/bionic/jemalloc_wrapper.cpp b/libc/bionic/jemalloc_wrapper.cpp
index ef488ee..ce3f314 100644
--- a/libc/bionic/jemalloc_wrapper.cpp
+++ b/libc/bionic/jemalloc_wrapper.cpp
@@ -102,7 +102,7 @@
       }
     }
     return 1;
-  } else if (param == M_PURGE) {
+  } else if (param == M_PURGE || param == M_PURGE_ALL) {
     // Only clear the current thread cache since there is no easy way to
     // clear the caches of other threads.
     // This must be done first so that cleared allocations get purged
diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index 02bda60..6a2d380 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -183,7 +183,15 @@
  * Available since API level 28.
  */
 #define M_PURGE (-101)
-
+/**
+ * mallopt() option to immediately purge all possible memory back to
+ * the kernel. This call can take longer than a normal purge since it
+ * examines everything. In some cases, it can take more than twice the
+ * time of a M_PURGE call. The value is ignored.
+ *
+ * Available since API level 34.
+ */
+#define M_PURGE_ALL (-104)
 
 /**
  * mallopt() option to tune the allocator's choice of memory tags to