diff --git a/src/external/rprand.h b/src/external/rprand.h
index 7e27d980f71d..8d77bf757abc 100644
--- a/src/external/rprand.h
+++ b/src/external/rprand.h
@@ -202,7 +202,7 @@ int *rprand_load_sequence(unsigned int count, int min, int max)
     {
         value = ((unsigned int)rprand_xoshiro()%(abs(max - min) + 1)) + min;
 
-        for (int j = 0; j < i; j++)
+        for (unsigned int j = 0; j < i; j++)
         {
             if (sequence[j] == value)
             {