diff --git a/src/rime/dict/dict_compiler.cc b/src/rime/dict/dict_compiler.cc
index b946dc656c..a4dbcd620c 100644
--- a/src/rime/dict/dict_compiler.cc
+++ b/src/rime/dict/dict_compiler.cc
@@ -6,6 +6,7 @@
 //
 #include <boost/filesystem.hpp>
 #include <cfloat>
+#include <cmath>
 #include <fstream>
 #include <rime/algo/algebra.h>
 #include <rime/algo/utilities.h>
diff --git a/src/rime/dict/user_dictionary.cc b/src/rime/dict/user_dictionary.cc
index 7fce5e4249..6d09ff686d 100644
--- a/src/rime/dict/user_dictionary.cc
+++ b/src/rime/dict/user_dictionary.cc
@@ -6,6 +6,7 @@
 //
 #include <algorithm>
 #include <cfloat>
+#include <cmath>
 #include <boost/algorithm/string.hpp>
 #include <boost/lexical_cast.hpp>
 #include <boost/scope_exit.hpp>
diff --git a/test/algebra_test.cc b/test/algebra_test.cc
index d1d918a00f..1fe3978abe 100644
--- a/test/algebra_test.cc
+++ b/test/algebra_test.cc
@@ -4,6 +4,7 @@
 //
 // 2012-01-19 GONG Chen <chen.sst@gmail.com>
 //
+#include <cmath>
 #include <gtest/gtest.h>
 #include <rime/common.h>
 #include <rime/algo/algebra.h>
diff --git a/test/calculus_test.cc b/test/calculus_test.cc
index 14ed3e78bd..1037b461e3 100644
--- a/test/calculus_test.cc
+++ b/test/calculus_test.cc
@@ -4,6 +4,7 @@
 //
 // 2012-01-17 GONG Chen <chen.sst@gmail.com>
 //
+#include <cmath>
 #include <gtest/gtest.h>
 #include <rime/common.h>
 #include <rime/algo/calculus.h>