diff --git a/opensfm/src/dense/src/depthmap.cc b/opensfm/src/dense/src/depthmap.cc
index a665d9296..57ef85b6d 100644
--- a/opensfm/src/dense/src/depthmap.cc
+++ b/opensfm/src/dense/src/depthmap.cc
@@ -126,7 +126,8 @@ cv::Vec3f PlaneFromDepthAndNormal(float x, float y, const cv::Matx33d &K,
 }
 
 float UniformRand(float a, float b) {
-  return a + (b - a) * float(rand()) / RAND_MAX;
+  // Note that float(RAND_MAX) cannot be exactly represented as a float. We ignore the small inaccuracy here; this is already a bad way to get random numbers.
+  return a + (b - a) * float(rand()) / static_cast<float>(RAND_MAX);
 }
 
 DepthmapEstimator::DepthmapEstimator()