diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c6dd598b..79aa279ea 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,7 +159,7 @@ endif()
 if(USE_PROJ4)
     message(STATUS "Using PROJ4")
     find_package(PROJ4 CONFIG REQUIRED)
-    list(APPEND MAPNIK_COMPILE_DEFS MAPNIK_USE_PROJ4)
+    list(APPEND MAPNIK_COMPILE_DEFS MAPNIK_USE_PROJ4 ACCEPT_USE_OF_DEPRECATED_PROJ_API_H=1)
     list(APPEND MAPNIK_OPTIONAL_LIBS proj)
 endif()
 
diff --git a/cmake/MapnikConfig.cmake.in b/cmake/MapnikConfig.cmake.in
index db991109b..4a1773f42 100644
--- a/cmake/MapnikConfig.cmake.in
+++ b/cmake/MapnikConfig.cmake.in
@@ -2,4 +2,4 @@
 
 include("${CMAKE_CURRENT_LIST_DIR}/MapnikTargets.cmake")
 
-check_required_components(mapnik)
\ No newline at end of file
+check_required_components(mapnik)
diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
index 96556acb3..1bc4c8ddd 100644
--- a/demo/CMakeLists.txt
+++ b/demo/CMakeLists.txt
@@ -8,4 +8,4 @@ endif()
 if(BUILD_DEMO_CPP)
     message(STATUS "Building c++ demo app")
     add_subdirectory(c++)
-endif()
\ No newline at end of file
+endif()
diff --git a/deps/CMakeLists.txt b/deps/CMakeLists.txt
index 69527cdfe..e96f65584 100644
--- a/deps/CMakeLists.txt
+++ b/deps/CMakeLists.txt
@@ -1,2 +1,2 @@
 cmake_minimum_required(VERSION 3.15.0)
-add_subdirectory(agg)
\ No newline at end of file
+add_subdirectory(agg)