--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -14,7 +14,6 @@ if (MSVC)
     set_source_files_properties(${src} PROPERTIES LANGUAGE CXX)
 endif()
 
-string(REPLACE "-O3" "-O2" CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
 
 add_library                     (leptonica ${src} ${hdr})
 set_target_properties           (leptonica PROPERTIES VERSION   ${VERSION_PLAIN})
@@ -52,7 +52,7 @@ if (TIFF_LIBRARIES)
 endif()
 if (WEBP_FOUND)
     target_include_directories  (leptonica PUBLIC ${WEBP_INCLUDE_DIRS})
-    target_link_libraries       (leptonica ${WEBP_LIBRARIES})
+    target_link_libraries       (leptonica WebP::webp WebP::libwebpmux)
 endif()
 if (ZLIB_LIBRARIES)
     target_include_directories  (leptonica PUBLIC ${ZLIB_INCLUDE_DIRS})