Add missing include to Graph.hh (#342)

Signed-off-by: Louise Poubel <[email protected]>
gazebosim · Dec 27, 2021 · 04a4c85 · 04a4c85
1 parent 132b0e4
commit 04a4c85
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/include/ignition/math/graph/Graph.hh b/include/ignition/math/graph/Graph.hh
@@ -18,6 +18,7 @@
 #define IGNITION_MATH_GRAPH_GRAPH_HH_
 
 #include <cassert>
+#include <iostream>
 #include <map>
 #include <ostream>
 #include <set>