diff --git a/config/libc/newlib.in.2 b/config/libc/newlib.in.2
index 927cce89..96bd22bf 100644
--- a/config/libc/newlib.in.2
+++ b/config/libc/newlib.in.2
@@ -140,6 +140,7 @@ config LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE
 config LIBC_NEWLIB_LTO
     bool
     prompt "Enable Link Time Optimization"
+    depends on CC_GCC_USE_LTO
     help
       Builds the libraries with -flto to enable more aggressive link time
       optimization. You will need to add -flto-partition=one to your