diff --git a/herbstluftwm/src/ipc-server.cpp b/herbstluftwm/src/ipc-server.cpp
index bdf1b92..19ff44a 100644
--- a/herbstluftwm/src/ipc-server.cpp
+++ b/herbstluftwm/src/ipc-server.cpp
@@ -4,6 +4,7 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 #include <cstdio>
+#include <limits>
 
 #include "ipc-protocol.h"
 #include "xconnection.h"
diff --git a/herbstluftwm/src/floating.cpp b/herbstluftwm/src/floating.cpp
index e56d17a..7818253 100644
--- a/herbstluftwm/src/floating.cpp
+++ b/herbstluftwm/src/floating.cpp
@@ -1,5 +1,6 @@
 #include "floating.h"
 
+#include <limits>
 #include <algorithm>
 #include <climits>
 #include <cstdlib>