diff --git a/src/json/CMakeLists.txt b/src/json/CMakeLists.txt
index 8428e87e4..a8430a2f7 100644
--- a/src/json/CMakeLists.txt
+++ b/src/json/CMakeLists.txt
@@ -17,6 +17,8 @@ add_library(json STATIC
 )
 add_library(mapnik::json ALIAS json)
 
+set_property(TARGET json PROPERTY POSITION_INDEPENDENT_CODE ON)
+
 target_include_directories(json PRIVATE
     ${JPEG_INCLUDE_DIR}
     ${LIBXML2_INCLUDE_DIR}
diff --git a/src/wkt/CMakeLists.txt b/src/wkt/CMakeLists.txt
index c787df8d5..1741834c2 100644
--- a/src/wkt/CMakeLists.txt
+++ b/src/wkt/CMakeLists.txt
@@ -9,6 +9,8 @@ add_library(wkt STATIC
 )
 add_library(mapnik::wkt ALIAS wkt)
 
+set_property(TARGET wkt PROPERTY POSITION_INDEPENDENT_CODE ON)
+
 target_include_directories(wkt PRIVATE
     ${MAPNIK_INCLUDE_PATH}
     ${JPEG_INCLUDE_DIR}