diff --git a/src/sds.c b/src/sds.c
index 26e90a6d..eafa13c2 100644
--- a/src/sds.c
+++ b/src/sds.c
@@ -35,6 +35,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <assert.h>
+#include <limits.h>
 #include "sds.h"
 #include "sdsalloc.h"
 
@@ -61,8 +62,10 @@ static inline char sdsReqType(size_t string_size) {
         return SDS_TYPE_8;
     if (string_size < 1<<16)
         return SDS_TYPE_16;
+#if (LONG_MAX == LLONG_MAX)
     if (string_size < 1ll<<32)
         return SDS_TYPE_32;
+#endif
     return SDS_TYPE_64;
 }