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-rw-r--r--src/wolff_ising.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/wolff_ising.cpp b/src/wolff_ising.cpp
index e072d6a..9866248 100644
--- a/src/wolff_ising.cpp
+++ b/src/wolff_ising.cpp
@@ -9,6 +9,7 @@
#include <ising.h>
// include wolff.h
+#include <rand.h>
#include <wolff.h>
int main(int argc, char *argv[]) {