diff --git a/extra/src/libevent.ecmp b/extra/src/libevent.ecmp
index a1a80df..4dc9d03 100644
--- a/extra/src/libevent.ecmp
+++ b/extra/src/libevent.ecmp
@@ -20,6 +20,6 @@ tar -xzf $NAME-$VERSION.tar.gz
 
 [install]
 mkdir build && cd build
-cmake ..
+cmake .. -DCMAKE_INSTALL_PREFIX=/usr
 make
 make DESTDIR=$BUILD_ROOT install