diff --git a/include/llvm/Support/DataTypes.h.cmake b/include/llvm/Support/DataTypes.h.cmake
index 4d6fcc8..dddc1d1 100644
--- a/include/llvm/Support/DataTypes.h.cmake
+++ b/include/llvm/Support/DataTypes.h.cmake
@@ -95,6 +95,11 @@
 #include <stdlib.h>
 #include <stddef.h>
 #include <sys/types.h>
+#ifdef __cplusplus
+#include <cmath>
+#else
+#include <math.h>
+#endif
 typedef __int64 int64_t;
 typedef unsigned __int64 uint64_t;
 typedef signed int int32_t;