diff --git a/tools/build-ubuntu-deps.bash b/tools/build-ubuntu-deps.bash
index 510589ae80..5ee84fc6e3 100755
--- a/tools/build-ubuntu-deps.bash
+++ b/tools/build-ubuntu-deps.bash
@@ -100,7 +100,7 @@ else
     cd knet
     sed -e "s/USE_TINYXML TRUE/USE_TINYXML FALSE/" -e "s/kNet STATIC/kNet SHARED/" -e "s/#set(USE_QT/set(USE_QT/" < CMakeLists.txt > x
     mv x CMakeLists.txt
-    cmake .
+    cmake . -DCMAKE_BUILD_TYPE=Debug
     make -j $nprocs
     cp lib/libkNet.so $prefix/lib/
     rsync -r include/* $prefix/include/