diff --git a/tests/test-sampling.cpp b/tests/test-sampling.cpp
index ebfc17c18..0e675127f 100644
--- a/tests/test-sampling.cpp
+++ b/tests/test-sampling.cpp
@@ -5,6 +5,7 @@
 #undef NDEBUG
 #endif
 
+#include <cmath>
 #include <numeric>
 #include <cassert>
 #include <iostream>