diff --git a/Dockerfile_kitkat b/Dockerfile_kitkat
index 7fb0f7e..9b62ba9 100644
--- a/Dockerfile_kitkat
+++ b/Dockerfile_kitkat
@@ -23,7 +23,7 @@ RUN apt-get update && \
         lib32readline-gplv2-dev lib32z1-dev libesd0-dev libncurses5-dev \
         libsdl1.2-dev libwxgtk2.8-dev libxml2-utils lzop \
         oracle-java6-installer oracle-java6-set-default \
-        genisoimage \
+        genisoimage yasm\
         pngcrush schedtool xsltproc zip zlib1g-dev libswitch-perl && \
     apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*