diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 56f47a4ac..5d450e8ea 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -382,6 +382,7 @@ RunPager::RunPager()
     stdout = fcntl(STDOUT_FILENO, F_DUPFD_CLOEXEC, 0);
     if (dup2(toPager.writeSide.get(), STDOUT_FILENO) == -1)
         throw SysError("dupping stdout");
+    setLogFormat(LogFormat::raw);
 }