diff --git a/tests/math_test.cpp b/tests/math_test.cpp
index 0bb072a..80083fa 100644
--- a/tests/math_test.cpp
+++ b/tests/math_test.cpp
@@ -51,6 +51,7 @@
 #include <gtest/gtest.h>
 
 #include <fenv.h>
+#include <float.h>
 #include <limits.h>
 #include <stdint.h>