diff --git a/src/Plugins/MagnumFont/CMakeLists.txt b/src/Plugins/MagnumFont/CMakeLists.txt
index 40509699e..82c4061e9 100644
--- a/src/Plugins/MagnumFont/CMakeLists.txt
+++ b/src/Plugins/MagnumFont/CMakeLists.txt
@@ -31,7 +31,7 @@ set(MagnumFont_HEADERS
     MagnumFont.h)
 
 add_library(MagnumFontObjects OBJECT ${MagnumFont_SOURCES})
-set_target_properties(MagnumFontObjects PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+set_target_properties(MagnumFontObjects PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 
 add_plugin(MagnumFont ${MAGNUM_PLUGINS_FONT_INSTALL_DIR}
     MagnumFont.conf
diff --git a/src/Plugins/MagnumFontConverter/CMakeLists.txt b/src/Plugins/MagnumFontConverter/CMakeLists.txt
index 849b8f705..9e023e56e 100644
--- a/src/Plugins/MagnumFontConverter/CMakeLists.txt
+++ b/src/Plugins/MagnumFontConverter/CMakeLists.txt
@@ -31,7 +31,7 @@ set(MagnumFontConverter_HEADERS
     MagnumFontConverter.h)
 
 add_library(MagnumFontConverterObjects OBJECT ${MagnumFontConverter_SOURCES})
-set_target_properties(MagnumFontConverterObjects PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+set_target_properties(MagnumFontConverterObjects PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 
 add_plugin(MagnumFontConverter ${MAGNUM_PLUGINS_FONTCONVERTER_INSTALL_DIR}
     MagnumFontConverter.conf
diff --git a/src/Plugins/TgaImageConverter/CMakeLists.txt b/src/Plugins/TgaImageConverter/CMakeLists.txt
index 81195bbba..67cee27c2 100644
--- a/src/Plugins/TgaImageConverter/CMakeLists.txt
+++ b/src/Plugins/TgaImageConverter/CMakeLists.txt
@@ -29,7 +29,7 @@ set(TgaImageConverter_HEADERS
     TgaImageConverter.h)
 
 add_library(TgaImageConverterObjects OBJECT ${TgaImageConverter_SRCS})
-set_target_properties(TgaImageConverterObjects PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+set_target_properties(TgaImageConverterObjects PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 
 add_plugin(TgaImageConverter ${MAGNUM_PLUGINS_IMAGECONVERTER_INSTALL_DIR}
     TgaImageConverter.conf
diff --git a/src/Plugins/TgaImporter/CMakeLists.txt b/src/Plugins/TgaImporter/CMakeLists.txt
index ce8654b2e..cd4c034ea 100644
--- a/src/Plugins/TgaImporter/CMakeLists.txt
+++ b/src/Plugins/TgaImporter/CMakeLists.txt
@@ -30,7 +30,7 @@ set(TgaImporter_HEADERS
     TgaImporter.h)
 
 add_library(TgaImporterObjects OBJECT ${TgaImporter_SRCS})
-set_target_properties(TgaImporterObjects PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+set_target_properties(TgaImporterObjects PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 
 add_plugin(TgaImporter ${MAGNUM_PLUGINS_IMPORTER_INSTALL_DIR}
     TgaImporter.conf