diff --git a/src/svgfill/CMakeLists.txt b/src/svgfill/CMakeLists.txt
index 0d9764013a..df2e4006cb 100644
--- a/src/svgfill/CMakeLists.txt
+++ b/src/svgfill/CMakeLists.txt
@@ -50,6 +50,9 @@ file(GLOB LIB_CPP_FILES src/svgfill.cpp src/arrange_polygons.cpp)
 set(LIB_SRC_FILES ${LIB_H_FILES} ${LIB_CPP_FILES})
 add_library(svgfill ${LIB_SRC_FILES})
 target_link_libraries(svgfill ${Boost_LIBRARIES} ${BCRYPT_LIBRARIES} LibXml2::LibXml2 IFCOPENSHELL_CGAL)
+if(BUILD_SHARED_LIBS)
+    target_compile_definitions(svgfill PUBLIC IFC_SHARED_BUILD)
+endif()
 set_target_properties(svgfill PROPERTIES PUBLIC_HEADER "${LIB_H_FILES}")
 
 add_executable(svgfill_exe src/main.cpp)