diff --git a/src/object.c b/src/object.c
index 58f8f44c..7abecfc6 100644
--- a/src/object.c
+++ b/src/object.c
@@ -35,7 +35,8 @@ robj *createStringObject(char *ptr, size_t len) {
 
 robj *createStringObjectFromLongLong(long long value) {
     robj *o;
-    if (value >= 0 && value < REDIS_SHARED_INTEGERS) {
+    if (value >= 0 && value < REDIS_SHARED_INTEGERS &&
+        pthread_equal(pthread_self(),server.mainthread)) {
         incrRefCount(shared.integers[value]);
         o = shared.integers[value];
     } else {