diff --git a/CMakeLists.txt b/CMakeLists.txt
index a577fcd52..2e8bc3704 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -588,29 +588,6 @@ endif (WITH_OPENH264 AND NOT WITH_OPENH264_LOADING)
 # Version check, if we have detected FFMPEG but the version is too old
 # deactivate it as sound backend.
 if (WITH_DSP_FFMPEG)
-	# Deactivate FFmpeg backend for sound, if the version is too old.
-	# See libfreerdp/codec/dsp_ffmpeg.h
-	file(STRINGS "${AVCODEC_INCLUDE_DIR}/libavcodec/version.h" AV_VERSION_FILE REGEX "LIBAVCODEC_VERSION_M[A-Z]+[\t ]*[0-9]+")
-	if (EXISTS "${AVCODEC_INCLUDE_DIR}/libavcodec/version_major.h")
-		file(STRINGS "${AVCODEC_INCLUDE_DIR}/libavcodec/version_major.h" AV_VERSION_FILE2 REGEX "LIBAVCODEC_VERSION_M[A-Z]+[\t ]*[0-9]+")
-		list(APPEND AV_VERSION_FILE ${AV_VERSION_FILE2})
-	endif()
-
-	FOREACH(item ${AV_VERSION_FILE})
-	  STRING(REGEX MATCH "LIBAVCODEC_VERSION_M[A-Z]+[\t ]*[0-9]+" litem ${item})
-		IF(litem)
-				string(REGEX REPLACE "[ \t]+" ";" VSPLIT_LINE ${litem})
-				list(LENGTH VSPLIT_LINE VSPLIT_LINE_LEN)
-				if (NOT "${VSPLIT_LINE_LEN}" EQUAL "2")
-					message(ERROR "invalid entry in libavcodec version header ${item}")
-				endif(NOT "${VSPLIT_LINE_LEN}" EQUAL "2")
-				list(GET VSPLIT_LINE 0 VNAME)
-				list(GET VSPLIT_LINE 1 VVALUE)
-				set(${VNAME} ${VVALUE})
-		ENDIF(litem)
-	ENDFOREACH(item ${AV_VERSION_FILE})
-
-	set(AVCODEC_VERSION "${LIBAVCODEC_VERSION_MAJOR}.${LIBAVCODEC_VERSION_MINOR}.${LIBAVCODEC_VERSION_MICRO}")
 	if (AVCODEC_VERSION VERSION_LESS "57.48.101")
 		message(WARNING "FFmpeg version detected (${AVCODEC_VERSION}) is too old. (Require at least 57.48.101 for sound). Deactivating")
 		set(WITH_DSP_FFMPEG OFF)