diff --git a/CMLibCodeCoverage.cmake b/CMLibCodeCoverage.cmake
index 2277a43..5ce4869 100644
--- a/CMLibCodeCoverage.cmake
+++ b/CMLibCodeCoverage.cmake
@@ -7,7 +7,7 @@ function(add_code_coverage target)
   if(CMLIB_ENABLE_CODE_COVERAGE)
     if(CMAKE_CXX_COMPILER_IS_GCC)
       target_compile_options(${target} PUBLIC "--coverage")
-      set_property(TARGET ${target} APPEND PROPERTY LINK_FLAGS "--coverage")
+      set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " --coverage")
 
       if(LCOV_EXE)
         add_custom_target(
diff --git a/CMLibCommonTargetProperties.cmake b/CMLibCommonTargetProperties.cmake
index 514bfd3..07f36b9 100644
--- a/CMLibCommonTargetProperties.cmake
+++ b/CMLibCommonTargetProperties.cmake
@@ -51,7 +51,7 @@ function(common_target_properties target)
       endif()
     endif()
     if(CMAKE_CXX_COMPILER_IS_GCC AND NOT APPLE)
-      set_property(TARGET ${target} APPEND PROPERTY LINK_FLAGS "-Wl,--no-as-needed")
+      set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " -Wl,--no-as-needed")
     endif()
   endif()
 
@@ -61,10 +61,10 @@ function(common_target_properties target)
     check_cxx_compiler_flag(-fno-fat-lto-objects CXX_HAS_NO_FAT_LTO_FLAG)
     if(CXX_HAS_LTO_FLAG)
       target_compile_options(${target} PUBLIC "-flto")
-      set_property(TARGET ${target} APPEND PROPERTY LINK_FLAGS "-flto")
+      set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " -flto")
       if(CXX_HAS_NO_FAT_LTO_FLAG)
         target_compile_options(${target} PUBLIC "-fno-fat-lto-objects")
-        set_property(TARGET ${target} APPEND PROPERTY LINK_FLAGS "-fno-fat-lto-objects")
+        set_property(TARGET ${target} APPEND_STRING PROPERTY LINK_FLAGS " -fno-fat-lto-objects")
       endif()
     endif()
   endif()