diff --git a/build_files/buildbot/slave_compile.py b/build_files/buildbot/slave_compile.py
index 5aa39db68f9..55e418ec733 100644
--- a/build_files/buildbot/slave_compile.py
+++ b/build_files/buildbot/slave_compile.py
@@ -126,7 +126,7 @@ else:
 
             for lib in all_ffmpeg_libs:
                 ffmpeg_lib.append(lib + '.lib')
-                ffmpeg_dll.append('${BF_FFMPEG_LIBPATH}/' + lib + '.lib')
+                ffmpeg_dll.append('${BF_FFMPEG_LIBPATH}/' + lib + '.dll')
 
             scons_options.append('BF_FFMPEG=' + LCGDIR + '/ffmpeg-0.8')
             scons_options.append('BF_FFMPEG_LIB=' + (' '.join(ffmpeg_lib)))
diff --git a/build_files/buildbot/slave_pack.py b/build_files/buildbot/slave_pack.py
index 3a3fffc02b4..fd3ff1fbee7 100644
--- a/build_files/buildbot/slave_pack.py
+++ b/build_files/buildbot/slave_pack.py
@@ -90,7 +90,7 @@ if builder.find('scons') != -1:
 
             for lib in all_ffmpeg_libs:
                 ffmpeg_lib.append(lib + '.lib')
-                ffmpeg_dll.append('${BF_FFMPEG_LIBPATH}/' + lib + '.lib')
+                ffmpeg_dll.append('${BF_FFMPEG_LIBPATH}/' + lib + '.dll')
 
             scons_options.append('BF_FFMPEG=' + LCGDIR + '/ffmpeg-0.8')
             scons_options.append('BF_FFMPEG_LIB=' + (' '.join(ffmpeg_lib)))