diff --git a/src/toolsrc/codegen.c b/src/toolsrc/codegen.c
index 78d93c2..1a6cf1b 100755
--- a/src/toolsrc/codegen.c
+++ b/src/toolsrc/codegen.c
@@ -1,3 +1,4 @@
+#include <stdint.h>
 #include <stdio.h>
 #include <ctype.h>
 #include "tokens.h"
diff --git a/src/toolsrc/lex.c b/src/toolsrc/lex.c
index 36bb711..b62f999 100755
--- a/src/toolsrc/lex.c
+++ b/src/toolsrc/lex.c
@@ -8,6 +8,7 @@
  * governing permissions and limitations under the License.
  */
 
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>