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-rw-r--r--ice40/bitstream.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/ice40/bitstream.cc b/ice40/bitstream.cc
index 0b6e0d35..c739d3c9 100644
--- a/ice40/bitstream.cc
+++ b/ice40/bitstream.cc
@@ -18,6 +18,7 @@
*
*/
#include "bitstream.h"
+#include <cctype>
#include <vector>
#include "log.h"