diff --git a/tools/spi-hdlc-adapter/spi-hdlc-adapter.c b/tools/spi-hdlc-adapter/spi-hdlc-adapter.c
index 0dcb34950..cd393a31d 100644
--- a/tools/spi-hdlc-adapter/spi-hdlc-adapter.c
+++ b/tools/spi-hdlc-adapter/spi-hdlc-adapter.c
@@ -1826,7 +1826,7 @@ int main(int argc, char *argv[])
 
     trigger_reset();
 
-    usleep(sSpiResetDelay * USEC_PER_MSEC);
+    usleep((useconds_t)sSpiResetDelay * USEC_PER_MSEC);
 
     // ========================================================================
     // MAIN LOOP