diff --git a/afsk/main.c b/afsk/main.c
index 300c4e91..9b034a66 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -238,7 +238,7 @@ int main(int argc, char *argv[]) {
 
   tx_freq_hz -= tx_channel * 50000 + 85000; // subtracting rx offset of 90kHz
   #ifdef DEBUG_LOGGING
-	printf("INFO: Transmit frequency %3.5f MHz\n", tx_freq_hz/1000000);
+	printf("INFO: Transmit frequency %3.5f MHz\n", ((float)tx_freq_hz)/1000000);
   #endif
 
   init_rf();