diff --git a/build_tc.sh b/build_tc.sh
index be2163d..e47f520 100644
--- a/build_tc.sh
+++ b/build_tc.sh
@@ -4,7 +4,6 @@ STEP=$1
 MODE=$2
 CPU_CORES=$3
 ENABLED_TOOLS=$4
-FFBRANCH=$5
 SRC=`realpath src`
 BUILD=`realpath build`
 
@@ -144,9 +143,14 @@ elif [ "$STEP" == "ffmpeg" ]; then
   
   echo "### Applying patches ..."
   cd $SRC/ffmpeg
-    
+  
+  echo "- patch #1 ..."
   patch -N -p1 -i ../../patches/0001-dynamic-loading-of-shared-fdk-aac-library.patch
-  if [ "$FFBRANCH" == "release/4.0" ]; then
+  
+  ffbranch=$(git rev-parse --abbrev-ref HEAD)
+  echo "Branch: $ffbranch"
+  if [ "$ffbranch" == "release/4.0" ]; then
+    echo "- patch #2 ..."
     patch -N -p0 -i ../../patches/0002-patch-ffmpeg-to-new-fdk-api.patch
   fi