diff --git a/INSTALL-MXE.md b/INSTALL-MXE.md
index 89bec0eb..d4b0bff7 100644
--- a/INSTALL-MXE.md
+++ b/INSTALL-MXE.md
@@ -44,6 +44,7 @@ To cross-compile Colobot using MXE:
     * mingwrt
     * ogg
     * openal
+    * physfs
     * portaudio
     * sdl
     * sdl_image
diff --git a/INSTALL.md b/INSTALL.md
index ec7b1529..fbf4ece4 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -115,11 +115,12 @@ You will need:
  * libvorbis >= 1.3.2
  * libogg >= 1.3.0
  * OpenAL (OpenAL-Soft) >= 1.13
+ * PhysFS
  * po4a >= 0.45 (to generate translated data files)
 
 On Ubuntu (and probably any other Debian-based system), you can use the following command to install all required packages:
 ```
-  $ apt-get install build-essential cmake libsdl1.2debian libsdl1.2-dev libsdl-image1.2 libsdl-image1.2-dev libsdl-ttf2.0-0 libsdl-ttf2.0-dev libsdl-mixer1.2 libsdl-mixer1.2-dev libsndfile1-dev libvorbis-dev libogg-dev libpng12-dev libglew-dev libopenal-dev libboost-dev libboost-system-dev libboost-filesystem-dev libboost-regex-dev gettext git po4a
+  $ apt-get install build-essential cmake libsdl1.2debian libsdl1.2-dev libsdl-image1.2 libsdl-image1.2-dev libsdl-ttf2.0-0 libsdl-ttf2.0-dev libsdl-mixer1.2 libsdl-mixer1.2-dev libsndfile1-dev libvorbis-dev libogg-dev libpng12-dev libglew-dev libopenal-dev libboost-dev libboost-system-dev libboost-filesystem-dev libboost-regex-dev libphysfs-dev gettext git po4a
 ```
 
 Make sure you install the packages along with header files (often distributed in separate *-dev packages). If you miss any requirements,