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-rw-r--r--gtk/preferences.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/gtk/preferences.c b/gtk/preferences.c
index 5e7c3c555..0f385066b 100644
--- a/gtk/preferences.c
+++ b/gtk/preferences.c
@@ -16,6 +16,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include <string.h>