diff --git configure.ac configure.ac
index a085ac3..f737b2d 100644
--- configure.ac
+++ configure.ac
@@ -940,10 +942,10 @@ AS_IF([test "${enable_optimizations}" != "no"], [
   dnl -O4 and -O3 only in production builds
   AS_IF([test "${enable_debug}" = "no"], [
     VLC_SAVE_FLAGS
-    CFLAGS="${CFLAGS} -O4"
-    CXXFLAGS="${CXXFLAGS} -O4"
-    OBJCFLAGS="${OBJCFLAGS} -O4"
-    AC_CACHE_CHECK([if $CC accepts -O4], [ac_cv_c_o4], [
+    CFLAGS="${CFLAGS} -O3"
+    CXXFLAGS="${CXXFLAGS} -O3"
+    OBJCFLAGS="${OBJCFLAGS} -O3"
+    AC_CACHE_CHECK([if $CC accepts -O3], [ac_cv_c_o4], [
       AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [
         ac_cv_c_o4=yes
       ], [