diff --git a/Source/cmcldeps.cxx b/Source/cmcldeps.cxx
index 356e214ac0..bf5a17bee8 100644
--- a/Source/cmcldeps.cxx
+++ b/Source/cmcldeps.cxx
@@ -23,6 +23,7 @@
 #include <vector>
 #include <queue>
 #include <cstdio>
+#include <algorithm>
 
 
 #ifdef _WIN32