diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a37b11a..935ac2a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -161,31 +161,31 @@ elseif(APPLE)
   # Set additional options for the OSX bundle.
   set(CPACK_BUNDLE_NAME ${PROJECT_NAME})
   set(CPACK_BUNDLE_PLIST $<TARGET_BUNDLE_CONTENT_DIR:qtk_gui>/Info.plist)
-  set(CPACK_BUNDLE_ICON ${QTK_OSX_ICONS})
+  set(CPACK_BUNDLE_ICON "${QTK_OSX_ICONS}")
 else(UNIX)
   # Linux
   # Install icons for qtk.
-  install(FILES ${QTK_RESOURCES}/icons/linux/kilroy-16.png
+  install(FILES "${QTK_RESOURCES}/icons/linux/kilroy-16.png"
       DESTINATION /usr/share/icons/hicolor/16x16/apps
       RENAME qtk.png)
-  install(FILES ${QTK_RESOURCES}/icons/linux/kilroy-32.png
+  install(FILES "${QTK_RESOURCES}/icons/linux/kilroy-32.png"
       DESTINATION /usr/share/icons/hicolor/32x32/apps
       RENAME qtk.png)
-  install(FILES ${QTK_RESOURCES}/icons/linux/kilroy-48.png
+  install(FILES "${QTK_RESOURCES}/icons/linux/kilroy-48.png"
       DESTINATION /usr/share/icons/hicolor/48x48/apps
       RENAME qtk.png)
-  install(FILES ${QTK_RESOURCES}/icons/linux/kilroy-64.png
+  install(FILES "${QTK_RESOURCES}/icons/linux/kilroy-64.png"
       DESTINATION /usr/share/icons/hicolor/64x64/apps
       RENAME qtk.png)
-  install(FILES ${QTK_RESOURCES}/icons/linux/kilroy-128.png
+  install(FILES "${QTK_RESOURCES}/icons/linux/kilroy-128.png"
       DESTINATION /usr/share/icons/hicolor/128x128/apps
       RENAME qtk.png)
-  install(FILES ${QTK_RESOURCES}/icons/linux/kilroy-256.png
+  install(FILES "${QTK_RESOURCES}/icons/linux/kilroy-256.png"
       DESTINATION /usr/share/icons/hicolor/256x256/apps
       RENAME qtk.png)
 
   # Install the desktop file for qtk.
-  install(FILES ${QTK_RESOURCES}/qtk.desktop
+  install(FILES "${QTK_RESOURCES}/qtk.desktop"
       DESTINATION /usr/share/applications)
 
   # Set additional options for the debian APT package.
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 4abd1e5..41f9765 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -64,7 +64,7 @@ elseif(APPLE)
       qtk_gui PROPERTIES
       MACOSX_BUNDLE TRUE
       MACOSX_BUNDLE_BUNDLE_NAME Qtk
-      MACOSX_BUNDLE_ICON_FILE ${QTK_OSX_ICONS}
+      MACOSX_BUNDLE_ICON_FILE "${QTK_OSX_ICONS}"
       MACOSX_BUNDLE_GUI_IDENTIFIER ${CMAKE_PROJECT_NAME}
       MACOSX_BUNDLE_INFO_STRING ${CMAKE_PROJECT_DESCRIPTION}
       MACOSX_BUNDLE_COPYRIGHT ${QTK_COPYRIGHT}