diff --git a/configure.ac b/configure.ac
index f514efb46..a780ce2e4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -328,7 +328,10 @@ RB_CHK_SYSHEADER([string],         [STRING])
 RB_CHK_SYSHEADER([sstream],        [SSTREAM])
 RB_CHK_SYSHEADER([fstream],        [FSTREAM])
 RB_CHK_SYSHEADER([iostream],       [IOSTREAM])
+RB_CHK_SYSHEADER([iomanip],        [IOMANIP])
 RB_CHK_SYSHEADER([cstdio],         [CSTDIO])
+RB_CHK_SYSHEADER([chrono],         [CHRONO])
+RB_CHK_SYSHEADER([ctime],          [CTIME])
 
 RB_CHK_SYSHEADER([windows.h],      [WINDOWS_H])
 RB_CHK_SYSHEADER([winsock2.h],     [WINSOCK2_H])
diff --git a/include/rb/requires.h b/include/rb/requires.h
index 142704a8c..e5ee9504f 100644
--- a/include/rb/requires.h
+++ b/include/rb/requires.h
@@ -77,7 +77,10 @@ extern "C" {
 #include <RB_INC_SSTREAM
 #include <RB_INC_FSTREAM
 #include <RB_INC_IOSTREAM
+//#include <RB_INC_IOMANIP
 #include <RB_INC_CSTDIO
+//#include <RB_INC_CHRONO
+#include <RB_INC_CTIME
 
 //#include <RB_INC_BOOST_LEXICAL_CAST_HPP
 #endif