diff --git a/3party/CMakeLists.txt b/3party/CMakeLists.txt
index 2fabf1fd70..b4c0433bc7 100644
--- a/3party/CMakeLists.txt
+++ b/3party/CMakeLists.txt
@@ -1,3 +1,7 @@
+# Fixes CMake deprecation warning:
+# Compatibility with CMake < 3.5 will be removed from a future version of CMake.
+set(CMAKE_WARN_DEPRECATED OFF CACHE BOOL "" FORCE)
+
 if (NOT WITH_SYSTEM_PROVIDED_3PARTY)
   # Configure expat library.
   # Suppress "Policy CMP0077 is not set: option() honors normal variables"
diff --git a/3party/freetype/CMakeLists.txt b/3party/freetype/CMakeLists.txt
index 47de0e4707..60c55eda8b 100644
--- a/3party/freetype/CMakeLists.txt
+++ b/3party/freetype/CMakeLists.txt
@@ -2,6 +2,9 @@ set(FT_DISABLE_HARFBUZZ ON)
 
 add_subdirectory(freetype)
 
+# Fix warning with ONE_PIXEL macro clash.
+target_compile_options(freetype PRIVATE -Wno-macro-redefined)
+
 # Use ft2build.h from the current directory instead of the default.
 target_include_directories(freetype
   BEFORE PUBLIC
@@ -10,3 +13,4 @@ target_include_directories(freetype
 )
 
 add_library(Freetype::Freetype ALIAS freetype)
+