diff --git a/src/intset.c b/src/intset.c
index 9ba13898d..e36685138 100644
--- a/src/intset.c
+++ b/src/intset.c
@@ -104,7 +104,8 @@ intset *intsetNew(void) {
 
 /* Resize the intset */
 static intset *intsetResize(intset *is, uint32_t len) {
-    uint32_t size = len*intrev32ifbe(is->encoding);
+    uint64_t size = (uint64_t)len*intrev32ifbe(is->encoding);
+    assert(size <= SIZE_MAX - sizeof(intset));
     is = zrealloc(is,sizeof(intset)+size);
     return is;
 }
diff --git a/src/rdb.c b/src/rdb.c
index e902388e6..53f67a72e 100644
--- a/src/rdb.c
+++ b/src/rdb.c
@@ -1562,7 +1562,9 @@ robj *rdbLoadObject(int rdbtype, rio *rdb, sds key) {
         if ((len = rdbLoadLen(rdb,NULL)) == RDB_LENERR) return NULL;
 
         /* Use a regular set when there are too many entries. */
-        if (len > server.set_max_intset_entries) {
+        size_t max_entries = server.set_max_intset_entries;
+        if (max_entries >= 1<<30) max_entries = 1<<30;
+        if (len > max_entries) {
             o = createSetObject();
             /* It's faster to expand the dict to the right size asap in order
              * to avoid rehashing */
diff --git a/src/t_set.c b/src/t_set.c
index 2bce6294d..a4fc5311a 100644
--- a/src/t_set.c
+++ b/src/t_set.c
@@ -66,7 +66,10 @@ int setTypeAdd(robj *subject, sds value) {
             if (success) {
                 /* Convert to regular set when the intset contains
                  * too many entries. */
-                if (intsetLen(subject->ptr) > server.set_max_intset_entries)
+                size_t max_entries = server.set_max_intset_entries;
+                /* limit to 1G entries due to intset internals. */
+                if (max_entries >= 1<<30) max_entries = 1<<30;
+                if (intsetLen(subject->ptr) > max_entries)
                     setTypeConvert(subject,OBJ_ENCODING_HT);
                 return 1;
             }