diff --git a/lib/blisp.c b/lib/blisp.c
index 5516ef0..a483392 100644
--- a/lib/blisp.c
+++ b/lib/blisp.c
@@ -192,8 +192,8 @@ blisp_return_t blisp_device_handshake(struct blisp_device* device,
     sleep_ms(50);  // Wait a bit so BootROM can init
   }
 
-  uint32_t bytes_count = device->chip->handshake_byte_multiplier *
-                         (float)device->current_baud_rate / 10.0f;
+  uint32_t bytes_count = (uint32_t)(device->chip->handshake_byte_multiplier *
+                                    (float)device->current_baud_rate / 10.0f);
   if (bytes_count > 600)
     bytes_count = 600;
   memset(handshake_buffer, 'U', bytes_count);