diff --git a/host/hackrf-tools/src/hackrf_sweep.c b/host/hackrf-tools/src/hackrf_sweep.c
index a1460735..da700fa2 100644
--- a/host/hackrf-tools/src/hackrf_sweep.c
+++ b/host/hackrf-tools/src/hackrf_sweep.c
@@ -35,6 +35,8 @@
 #include <fftw3.h>
 #include <math.h>
 
+#define _FILE_OFFSET_BITS 64
+
 #ifndef bool
 typedef int bool;
 #define true 1
diff --git a/host/hackrf-tools/src/hackrf_transfer.c b/host/hackrf-tools/src/hackrf_transfer.c
index ed4bc6ad..f44a0e25 100644
--- a/host/hackrf-tools/src/hackrf_transfer.c
+++ b/host/hackrf-tools/src/hackrf_transfer.c
@@ -34,6 +34,8 @@
 #include <fcntl.h>
 #include <errno.h>
 
+#define _FILE_OFFSET_BITS 64
+
 #ifndef bool
 typedef int bool;
 #define true 1