diff --git a/Scripts/ffmpeg-build-x86_64.sh b/Scripts/ffmpeg-build-x86_64.sh
index 9cd070b3e..ef3647439 100755
--- a/Scripts/ffmpeg-build-x86_64.sh
+++ b/Scripts/ffmpeg-build-x86_64.sh
@@ -4,8 +4,9 @@ set -e
 
 # This is the commands used to build the ffmpeg libs provided here
 ./configure\
-    --extra-cflags="-fPIC -isysroot $(xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -mmacosx-version-min=10.13"\
-    --extra-ldflags="-mmacosx-version-min=10.13"\
+    --arch=x86_64\
+    --extra-cflags="-arch x86_64 -fPIC -isysroot $(xcode-select -p)/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk -mmacosx-version-min=10.13"\
+    --extra-ldflags="-arch x86_64 -mmacosx-version-min=10.13"\
     --enable-static --disable-shared\
     --prefix="$1/x86_64"\
     --incdir="$1/include"\