diff --git a/src/algorithms/signal_source/libs/fpga_spidev.h b/src/algorithms/signal_source/libs/fpga_spidev.h
index 5fbe2f41c..ccef015d2 100644
--- a/src/algorithms/signal_source/libs/fpga_spidev.h
+++ b/src/algorithms/signal_source/libs/fpga_spidev.h
@@ -16,6 +16,7 @@
 #ifndef GNSS_SDR_FPGA_SPIDEV_H
 #define GNSS_SDR_FPGA_SPIDEV_H
 
+#include <cstdint>
 #include <string>
 
 class Fpga_spidev