diff --git a/src/scripting.c b/src/scripting.c
index 327d81222a2001e82b73109ab85e7061c703a0c7..2774a5d6665e28e5b0cd7d0ea37b34641c26cda3 100644
--- a/src/scripting.c
+++ b/src/scripting.c
@@ -233,12 +233,22 @@ int luaRedisGenericCommand(lua_State *lua, int raise_error) {
         char *obj_s;
         size_t obj_len;
 
-        obj_s = (char*)lua_tolstring(lua,j+1,&obj_len);
-        if (obj_s == NULL) break; /* Not a string. */
+        if (lua_isnumber(lua,j+1)) {
+            /* We can't use lua_tolstring() for number -> string conversion
+             * since Lua uses a format specifier that loses precision. */
+            char dbuf[64];
+            lua_Number num = lua_tonumber(lua,j+1);
+
+            obj_len = snprintf(dbuf,sizeof(dbuf),"%.17g",(double)num);
+            obj_s = dbuf;
+        } else {
+            obj_s = (char*)lua_tolstring(lua,j+1,&obj_len);
+            if (obj_s == NULL) break; /* Not a string. */
+        }
 
         /* Try to use a cached object. */
-        if (j < LUA_CMD_OBJCACHE_SIZE && cached_objects[j] && 
-            cached_objects_len[j] >= obj_len) 
+        if (j < LUA_CMD_OBJCACHE_SIZE && cached_objects[j] &&
+            cached_objects_len[j] >= obj_len)
         {
             char *s = cached_objects[j]->ptr;
             struct sdshdr *sh = (void*)(s-(sizeof(struct sdshdr)));