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-rw-r--r--src/graph.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/graph.c b/src/graph.c
index c26e4e40..f3c043c7 100644
--- a/src/graph.c
+++ b/src/graph.c
@@ -18,6 +18,7 @@
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <stdlib.h>
#include "ch.h"
#include "hal.h"
#include "gdisp.h"