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-rw-r--r--src/libvpsc/generate-constraints.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libvpsc/generate-constraints.cpp b/src/libvpsc/generate-constraints.cpp
index 3b69e7968..3574a2743 100644
--- a/src/libvpsc/generate-constraints.cpp
+++ b/src/libvpsc/generate-constraints.cpp
@@ -12,6 +12,7 @@
#include <set>
#include <cassert>
+#include <cstdlib>
#include "generate-constraints.h"
#include "constraint.h"