--- a/env/fs_posix.cc
+++ b/env/fs_posix.cc
@@ -905,8 +905,8 @@
     if (env && env[0] != '\0') {
       *result = env;
     } else {
-      char buf[100];
-      snprintf(buf, sizeof(buf), "/tmp/rocksdbtest-%d", int(geteuid()));
+      char buf[] = "@TERMUX_PREFIX@/tmp/rocksdbtest-XXXXXXXXXXX";
+      snprintf(buf, sizeof(buf), "@TERMUX_PREFIX@/tmp/rocksdbtest-%d", int(geteuid()));
       *result = buf;
     }
     // Directory may already exist