Add missing include to Graph.hh (gazebosim#342)

Signed-off-by: Louise Poubel <[email protected]>
akshatpandya · Dec 28, 2021 · c7075d7 · c7075d7
1 parent 6c27dae
commit c7075d7
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>