diff --git a/utils/genrandconfig b/utils/genrandconfig
index f2f1e33361..5796bbaa0f 100755
--- a/utils/genrandconfig
+++ b/utils/genrandconfig
@@ -279,12 +279,12 @@ async def fixup_config(sysinfo, configfile):
        'BR2_PACKAGE_FLANN=y\n' in configlines:
         return False
     # No C library for internal toolchain
-    if 'BR2_TOOLCHAIN_BUILDROOT_NONE=y' in configlines:
+    if 'BR2_TOOLCHAIN_BUILDROOT_NONE=y\n' in configlines:
         return False
     # Xtensa custom cores require an overlay file with internal
     # toolchains
-    if 'BR2_XTENSA_CUSTOM=y' in configlines and \
-       'BR2_TOOLCHAIN_BUILDROOT=y' in configlines:
+    if 'BR2_XTENSA_CUSTOM=y\n' in configlines and \
+       'BR2_TOOLCHAIN_BUILDROOT=y\n' in configlines:
         return False
 
     if 'BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y\n' in configlines: