--- /dev/null
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 4a978dd..e7abd57 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -454,6 +454,9 @@ endif()
+ if(PNG_FOUND)\r
+ target_include_directories(simage PRIVATE ${PNG_INCLUDE_DIR})\r
+ target_link_libraries(simage PRIVATE ${PNG_LIBRARIES})\r
++ if(UNIX)\r
++ target_link_libraries(simage PRIVATE m)\r
++ endif()\r
+ endif()\r
+ \r
+ if(SIMAGE_QIMAGE_SUPPORT)\r