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-rw-r--r--src/libutil/util.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libutil/util.hh b/src/libutil/util.hh
index e5ce55341881..d7d3e5edf817 100644
--- a/src/libutil/util.hh
+++ b/src/libutil/util.hh
@@ -8,7 +8,7 @@
 #include <unistd.h>
 #include <signal.h>
 
-#include <iostream>
+#include <cstdio>
 
 
 namespace nix {