Merge "Add missing includes."
diff --git a/util/stm32_flash/uart.c b/util/stm32_flash/uart.c
index 4ea0899..efc7a97 100644
--- a/util/stm32_flash/uart.c
+++ b/util/stm32_flash/uart.c
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <string.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <termios.h>