diff --git a/src/rime/gear/script_translator.cc b/src/rime/gear/script_translator.cc
index 4a45f05..2506165 100644
--- a/src/rime/gear/script_translator.cc
+++ b/src/rime/gear/script_translator.cc
@@ -8,6 +8,7 @@
 //
 #include <algorithm>
 #include <stack>
+#include <cmath>
 #include <boost/algorithm/string/join.hpp>
 #include <boost/range/adaptor/reversed.hpp>
 #include <rime/composition.h>
diff --git a/src/rime/gear/table_translator.cc b/src/rime/gear/table_translator.cc
index 162ac02..c95e5e2 100644
--- a/src/rime/gear/table_translator.cc
+++ b/src/rime/gear/table_translator.cc
@@ -6,6 +6,7 @@
 //
 #include <boost/algorithm/string.hpp>
 #include <boost/range/adaptor/reversed.hpp>
+#include <cmath>
 #include <utf8.h>
 #include <rime/candidate.h>
 #include <rime/common.h>