diff --git a/utils/genrandconfig b/utils/genrandconfig
index 0889be0d43..fb493f3f31 100755
--- a/utils/genrandconfig
+++ b/utils/genrandconfig
@@ -267,12 +267,12 @@ async def fixup_config(sysinfo, configfile):
        BR2_TOOLCHAIN_EXTERNAL_URL + 'mipsel-ctng-linux-uclibc.tar.xz"\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: