diff --git a/sdr_bladerf.c b/sdr_bladerf.c
index 8577b9d..65ef2a8 100644
--- a/sdr_bladerf.c
+++ b/sdr_bladerf.c
@@ -23,6 +23,11 @@
 #include <libbladeRF.h>
 #include <inttypes.h>
 
+// Polyfill for the older bladerf API
+#if defined(LIBBLADERF_API_VERSION) && (LIBBLADERF_API_VERSION < 0x02000000)
+typedef unsigned int bladerf_frequency;
+#endif
+
 static struct {
     const char *device_str;
     const char *fpga_path;
@@ -102,7 +107,7 @@ static void show_config()
     int status;
 
     unsigned rate;
-    unsigned freq;
+    bladerf_frequency freq;
     bladerf_lpf_mode lpf_mode;
     unsigned lpf_bw;
     bladerf_lna_gain lna_gain;