diff --git a/include/ad9915.h b/include/ad9915.h
index 900abb5..afb72c9 100644
--- a/include/ad9915.h
+++ b/include/ad9915.h
@@ -54,9 +54,9 @@ int setDdsFreqFull ( int fd, int f_dds, double f_clk, double f_out, uint16_t amp
 //------------ DRCTL
 
 void sendCtrlUp(int fp);
-void SendCtrlDown(int fp);
-void SendHold(int fp);
-void SendUnhold(int fp);
+void sendCtrlDown(int fp);
+void sendHold(int fp);
+void sendUnhold(int fp);
 int testRampFreq(int fd, int f_dds, int fp);
 
 //-------Profile register mode