Errors when compiling Osmium example

I'm trying to compile the examples from Osmium, but I get an error.

$:~/osmium/examples$ make

g++ -g -Wall -Wextra -Wdisabled-optimization -pedantic -Wctor-dtor-privacy -Wnon-virtual-dtor -Woverloaded-virtual -Wsign-promo -Wno-long-long -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I../include -DOSMIUM_WITH_DEBUG -I/usr/include/libxml2 -o osmium_convert osmium_convert.cpp -lexpat -lz -lpthread -lprotobuf-lite -losmpbf -lxml2
In file included from ../include/osmium/handler.hpp:33:0,
                 from ../include/osmium/input.hpp:29,
                 from ../include/osmium/input/pbf.hpp:35,
                 from ../include/osmium.hpp:26,
                 from osmium_convert.cpp:33:
../include/osmium/osm/area.hpp:27:36: fatal error: geos/geom/MultiPolygon.h: No such file or directory
compilation terminated.
make: *** [osmium_convert] Error 1

$:~/osmium/examples$