diff --git a/intern/mikktspace/mikk_float3.hh b/intern/mikktspace/mikk_float3.hh
index b0b34e9fde3..ca627f40561 100644
--- a/intern/mikktspace/mikk_float3.hh
+++ b/intern/mikktspace/mikk_float3.hh
@@ -64,7 +64,7 @@ struct float3 {
 
   float length() const
   {
-    return sqrt(length_squared());
+    return sqrtf(length_squared());
   }
 
   static float distance(const float3 &a, const float3 &b)