diff --git a/cmake/Libraries.cmake b/cmake/Libraries.cmake
index a4fc40417..61da376be 100644
--- a/cmake/Libraries.cmake
+++ b/cmake/Libraries.cmake
@@ -83,7 +83,6 @@ macro(configure_unix_libs)
   include(CheckCSourceCompiles)
 
   check_include_files(sys/socket.h HAVE_SYS_SOCKET_H)
-  check_include_files(sys/time.h HAVE_SYS_TIME_H)
   check_include_files(unistd.h HAVE_UNISTD_H)
 
   check_function_exists(sigwait HAVE_POSIX_SIGWAIT)
@@ -155,7 +154,6 @@ macro(configure_unix_libs)
   # For config.h, set some static values; it may be a good idea to make these
   # values dynamic for non-standard UNIX compilers.
   set(HAVE_PTHREAD_SIGNAL 1)
-  set(TIME_WITH_SYS_TIME 1)
   set(HAVE_SOCKLEN_T 1)
 
   # Unix only: For config.h, save the results based on a template (config.h.in).
diff --git a/src/lib/Config.h.in b/src/lib/Config.h.in
index 286d69e83..0b93f3f58 100644
--- a/src/lib/Config.h.in
+++ b/src/lib/Config.h.in
@@ -28,9 +28,6 @@
 /* Define to 1 if you have the <sys/socket.h> header file. */
 #cmakedefine HAVE_SYS_SOCKET_H @HAVE_SYS_SOCKET_H@
 
-/* Define to 1 if you have the <sys/time.h> header file. */
-#cmakedefine HAVE_SYS_TIME_H @HAVE_SYS_TIME_H@
-
 /* Define to 1 if you have the <sys/types.h> header file. */
 #cmakedefine HAVE_SYS_TYPES_H @HAVE_SYS_TYPES_H@
 
@@ -55,9 +52,6 @@
 /* Define this if the XKB extension is available. */
 #cmakedefine HAVE_XKB_EXTENSION @HAVE_XKB_EXTENSION@
 
-/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
-#cmakedefine TIME_WITH_SYS_TIME @TIME_WITH_SYS_TIME@
-
 /* Define to 1 if the X Window System is missing or not being used. */
 #cmakedefine X_DISPLAY_MISSING @X_DISPLAY_MISSING@
 
diff --git a/src/lib/arch/unix/ArchMultithreadPosix.cpp b/src/lib/arch/unix/ArchMultithreadPosix.cpp
index e433855a5..96c5405e8 100644
--- a/src/lib/arch/unix/ArchMultithreadPosix.cpp
+++ b/src/lib/arch/unix/ArchMultithreadPosix.cpp
@@ -10,18 +10,10 @@
 #include "arch/Arch.h"
 #include "arch/XArch.h"
 
-#include <signal.h>
-#if TIME_WITH_SYS_TIME
-#include <sys/time.h>
-#include <time.h>
-#else
-#if HAVE_SYS_TIME_H
-#include <sys/time.h>
-#else
-#include <time.h>
-#endif
-#endif
 #include <cerrno>
+#include <signal.h>
+#include <sys/time.h>
+#include <time.h>
 
 #define SIGWAKEUP SIGUSR1