diff --git a/rtexif/CMakeLists.txt b/rtexif/CMakeLists.txt
index 312400cf5..820f682a4 100644
--- a/rtexif/CMakeLists.txt
+++ b/rtexif/CMakeLists.txt
@@ -2,12 +2,10 @@ add_library(rtexif rtexif.cc stdattribs.cc nikonattribs.cc canonattribs.cc penta
 add_dependencies(rtexif UpdateInfo)
 
 if(WIN32)
-    set_target_properties(rtexif PROPERTIES COMPILE_FLAGS " -ffast-math -fexpensive-optimizations")
     include_directories(${EXTRA_INCDIR} ${GLIB2_INCLUDE_DIRS} ${GLIBMM_INCLUDE_DIRS} ${GTK_INCLUDE_DIRS} ${GTKMM_INCLUDE_DIRS})
     link_directories(. "${PROJECT_SOURCE_DIR}/rtexif" ${EXTRA_LIBDIR} ${GLIB2_LIBRARY_DIRS} ${GLIBMM_LIBRARY_DIRS} ${GTK_LIBRARY_DIRS} ${GTKMM_LIBRARY_DIRS})
-    #set_target_properties (rth PROPERTIES LINK_FLAGS "-mwindows")
 else()
-    set_target_properties(rtexif PROPERTIES COMPILE_FLAGS " -ffast-math -fexpensive-optimizations -fPIC")
+    set_target_properties(rtexif PROPERTIES COMPILE_FLAGS " -fPIC")
     include_directories(${EXTRA_INCDIR} ${GLIB2_INCLUDE_DIRS} ${GLIBMM_INCLUDE_DIRS} ${GTK_INCLUDE_DIRS} ${GTKMM_INCLUDE_DIRS})
     link_directories(${EXTRA_LIBDIR} ${GLIB2_LIBRARY_DIRS} ${GLIBMM_LIBRARY_DIRS} ${GTK_LIBRARY_DIRS} ${GTKMM_LIBRARY_DIRS})
 endif()