diff --git a/fpdkcom.c b/fpdkcom.c
index edbccf3..829f235 100644
--- a/fpdkcom.c
+++ b/fpdkcom.c
@@ -31,7 +31,7 @@ static const char FPDK_VERSCAN[] = "FREE-PDK EASY PROG - HW:%u.%u SW:%u.%u PROTO
 #define FPDKCOM_CMDRSP_PROBEIC_TIMEOUT      3500
 #define FPDKCOM_CMDRSP_READIC_TIMEOUT       1000
 #define FPDKCOM_CMDRSP_ERASE_TIMEOUT        2000
-#define FPDKCOM_CMDRSP_WRITE_TIMEOUT        2000
+#define FPDKCOM_CMDRSP_WRITE_TIMEOUT        4000
 #define FPDKCOM_CMDRSP_CALIBRATEIC_TIMEOUT  10000
 
 static bool _FPDKCOM_SendCommand(const int fd, const FPDKPROTO_CMD cmd, const uint8_t* dat, const uint8_t len)
@@ -449,7 +449,7 @@ int FPDKCOM_IC_Write(const int fd,
                     write_block_clock_group_trail_clocks };
 
   uint8_t resp[3+sizeof(uint16_t)];
-  if( sizeof(resp) != _FPDKCOM_SendReceiveCommandWithTimeout(fd, FPDKPROTO_CMD_WRITEIC, dat,sizeof(dat), resp, sizeof(resp), FPDKCOM_CMDRSP_READIC_TIMEOUT) )
+  if( sizeof(resp) != _FPDKCOM_SendReceiveCommandWithTimeout(fd, FPDKPROTO_CMD_WRITEIC, dat,sizeof(dat), resp, sizeof(resp), FPDKCOM_CMDRSP_WRITE_TIMEOUT) )
     return -1;
 
   return( resp[3] | (((int)resp[4])<<8) );