diff --git a/src/animations/animation_base.cpp b/src/animations/animation_base.cpp
index 6d995592e..f36760138 100644
--- a/src/animations/animation_base.cpp
+++ b/src/animations/animation_base.cpp
@@ -135,7 +135,7 @@ void AnimationBase::computeLengths()
     for_in (curr, m_all_ipos)
     {
         const std::vector<core::vector2df>& points = curr->getPoints();
-        max_points = std::max(max_points, points.size());
+        max_points = std::max(max_points, (unsigned int) points.size());
     }
 
     // Divide (on average) each segment into STEPS points, and use
@@ -163,4 +163,4 @@ void AnimationBase::computeLengths()
         distance += (xyz-xyz_old).getLength();
         xyz_old = xyz;
     }   // for i in m_points
-}   // computeLengths
\ No newline at end of file
+}   // computeLengths