diff --git a/doc/man/ossfs.1.in b/doc/man/ossfs.1.in
index b7bc45e..68cf3e5 100644
--- a/doc/man/ossfs.1.in
+++ b/doc/man/ossfs.1.in
@@ -136,7 +136,7 @@ maximum number of entries in the stat cache and symbolic link cache.
 specify expire time (seconds) for entries in the stat cache and symbolic link cache. This expire time indicates the time since cached.
 .TP
 \fB\-o\fR stat_cache_interval_expire (default is 900)
-specify expire time (seconds) for entries in the stat cache and symbolic link cache. This expire time is based on the time from the last access time of those cache.
+specify expire time (seconds) for entries in the stat cache and symbolic link cache. This expire time is based on the time from the last access time of those cache. -1 value means disable.
 This option is exclusive with stat_cache_expire, and is left for compatibility with older versions.
 .TP
 \fB\-o\fR enable_noobj_cache (default is disable)
diff --git a/src/s3fs.cpp b/src/s3fs.cpp
index d707ecc..b898c22 100644
--- a/src/s3fs.cpp
+++ b/src/s3fs.cpp
@@ -4324,9 +4324,14 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
             return 0;
         }
         if(is_prefix(arg, "stat_cache_expire=")){
-            time_t expr_time = static_cast<time_t>(cvt_strtoofft(strchr(arg, '=') + sizeof(char), 10));
+            auto value = cvt_strtoofft(strchr(arg, '=') + sizeof(char), /*base=*/ 10);
+            if(value == -1){
+                StatCache::getStatCacheData()->UnsetExpireTime();
+                return 0;
+            }
+            time_t expr_time = static_cast<time_t>(value);
             StatCache::getStatCacheData()->SetExpireTime(expr_time);
-            return 0;
+            return 0; 
         }
         // [NOTE]
         // This option is for compatibility old version.
diff --git a/src/s3fs_help.cpp b/src/s3fs_help.cpp
index 15d1965..efd3215 100644
--- a/src/s3fs_help.cpp
+++ b/src/s3fs_help.cpp
@@ -151,6 +151,7 @@ static const char help_string[] =
     "      - specify expire time (seconds) for entries in the stat cache.\n"
     "        This expire time indicates the time since stat cached. and this\n"
     "        is also set to the expire time of the symbolic link cache.\n"
+    "        -1 value means disable.\n"
     "\n"
     "   stat_cache_interval_expire (default is 900)\n"
     "      - specify expire time (seconds) for entries in the stat cache(and\n"