diff --git a/firmware/dfu-util.cmake b/firmware/dfu-util.cmake
index e2abfeb3..d1f48dce 100644
--- a/firmware/dfu-util.cmake
+++ b/firmware/dfu-util.cmake
@@ -30,22 +30,6 @@ execute_process(
 
 set(DFU_ALL "")
 if(NOT DFU_NOT_FOUND)
-	string(REGEX REPLACE ".*([0-9]+)\\.[0-9]+.*" "\\1" DFU_VERSION_MAJOR "${DFU_VERSION_STRING}")
-	string(REGEX REPLACE ".*[0-9]+\\.([0-9])+.*" "\\1" DFU_VERSION_MINOR "${DFU_VERSION_STRING}")
-	MESSAGE( STATUS "DFU utils version: " ${DFU_VERSION_MAJOR} "." ${DFU_VERSION_MINOR})
-	execute_process(
-	        COMMAND dfu-prefix -V
-		WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-		RESULT_VARIABLE DFU_PREFIX_NOT_FOUND
-		ERROR_QUIET
-		OUTPUT_VARIABLE DFU_PREFIX_VERSION_STRING
-		OUTPUT_STRIP_TRAILING_WHITESPACE
-	)
-	if(DFU_PREFIX_NOT_FOUND)
-		set(DFU_COMMAND dfu-suffix --vid=0x1fc9 --pid=0x000c --did=0x0 -s 0 -a _tmp.dfu)
-	else(DFU_PREFIX_NOT_FOUND)
-		set(DFU_COMMAND dfu-suffix --vid=0x1fc9 --pid=0x000c --did=0x0 -a _tmp.dfu && dfu-prefix -s 0 -a _tmp.dfu)
-	endif(DFU_PREFIX_NOT_FOUND)
     set(DFU_ALL "ALL")
 else(NOT DFU_NOT_FOUND)
 	MESSAGE(STATUS "dfu-suffix not found: not building DFU file")
@@ -53,4 +37,4 @@ endif(NOT DFU_NOT_FOUND)
 
 
 
-    
\ No newline at end of file
+    
diff --git a/firmware/dfu.py b/firmware/dfu.py
index d8057505..a1451cda 100644
--- a/firmware/dfu.py
+++ b/firmware/dfu.py
@@ -4,5 +4,5 @@ import sys
 
 with open("_header.bin", "wb") as f:
     x = struct.pack('<H', os.path.getsize(sys.argv[1] + '_dfu.bin') // 512 + 1)
-    y = [0xda, 0xff, x[0], x[1], 0xff, 0xff, 0xff, 0xff]
+    y = [0xda, 0xff, x[0], x[1]] + [0xff] * 12
     f.write(bytearray(y))
diff --git a/firmware/hackrf-common.cmake b/firmware/hackrf-common.cmake
index 177da4d3..b61a86fd 100644
--- a/firmware/hackrf-common.cmake
+++ b/firmware/hackrf-common.cmake
@@ -27,13 +27,13 @@
 
 enable_language(C CXX ASM)
 
-include(../dfu-util.cmake)
-
 SET(PATH_HACKRF ../..)
 SET(PATH_HACKRF_FIRMWARE ${PATH_HACKRF}/firmware)
 SET(PATH_HACKRF_FIRMWARE_COMMON ${PATH_HACKRF_FIRMWARE}/common)
 SET(LIBOPENCM3 ${PATH_HACKRF_FIRMWARE}/libopencm3)
 
+include(${PATH_HACKRF_FIRMWARE}/dfu-util.cmake)
+
 execute_process(
 	COMMAND git log -n 1 --format=%h
 	WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
@@ -206,7 +206,7 @@ macro(DeclareTargets)
 		DEPENDS ${PROJECT_NAME}_dfu.bin
 		COMMAND rm -f _tmp.dfu _header.bin
 		COMMAND cp ${PROJECT_NAME}_dfu.bin _tmp.dfu
-		COMMAND ${DFU_COMMAND}
+		COMMAND dfu-suffix --vid=0x1fc9 --pid=0x000c --did=0x0 -a _tmp.dfu
 		COMMAND python ../../dfu.py ${PROJECT_NAME}
 		COMMAND cat _header.bin _tmp.dfu >${PROJECT_NAME}.dfu
 		COMMAND rm -f _tmp.dfu _header.bin