diff --git a/travis-compile.sh b/travis-compile.sh
index 14b558a4..6f24558c 100755
--- a/travis-compile.sh
+++ b/travis-compile.sh
@@ -6,11 +6,11 @@ mkdir build
 cd build
 prefix=""
 if [[ $TRAVIS_OS_NAME == "osx" && $QT4 == 0 ]]; then
-  prefix="-DCMAKE_PREFIX_PATH=`echo /usr/local/Cellar/qt5/5.*/`"
+  prefix="-DCMAKE_PREFIX_PATH=$(echo /usr/local/Cellar/qt5/5.*/)"
 fi
 if [[ $TRAVIS_OS_NAME == "linux" && $QT4 == 0 ]]; then
-  prefix="-DCMAKE_PREFIX_PATH=`echo /opt/qt5*/lib/cmake/`"
-  export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:`echo /opt/qt5*/lib/`
+  prefix="-DCMAKE_PREFIX_PATH=$(echo /opt/qt5*/lib/cmake/)"
+  export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$(echo /opt/qt5*/lib/)"
 fi
 
 if [[ $BUILDTYPE == "Debug" ]]; then