diff --git a/openfpga/src/fpga_bitstream/fabric_bitstream.h b/openfpga/src/fpga_bitstream/fabric_bitstream.h
index 67e92f9f8..85a5054b8 100644
--- a/openfpga/src/fpga_bitstream/fabric_bitstream.h
+++ b/openfpga/src/fpga_bitstream/fabric_bitstream.h
@@ -30,6 +30,7 @@
 #ifndef FABRIC_BITSTREAM_H
 #define FABRIC_BITSTREAM_H
 
+#include <cstdint>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>