diff --git a/src/roboclaw_driver.cpp b/src/roboclaw_driver.cpp
index 10b1b6c..1366982 100644
--- a/src/roboclaw_driver.cpp
+++ b/src/roboclaw_driver.cpp
@@ -207,7 +207,7 @@ namespace roboclaw {
         txrx(address, 20, nullptr, 0, rx_buffer, sizeof(rx_buffer), true, false);
     }
 
-    void driver::set_velocity(unsigned char address, std::pair<int, int> speed) {
+    void driver::set_velocity(unsigned char address, std::pair<int32_t, int32_t> speed) {
         unsigned char rx_buffer[1];
         unsigned char tx_buffer[8];
 
@@ -239,4 +239,4 @@ namespace roboclaw {
         txrx(address, 34, tx_buffer, sizeof(tx_buffer), rx_buffer, sizeof(rx_buffer), true, false);
     }
 
-}
\ No newline at end of file
+}