diff --git a/src/htslib-1.18/config.mk.in b/src/htslib-1.18/config.mk.in
index 1166103..cc05f9d 100644
--- a/src/htslib-1.18/config.mk.in
+++ b/src/htslib-1.18/config.mk.in
@@ -115,7 +115,7 @@ LIBS += $(noplugin_LIBS)
 endif
 
 # Extra CFLAGS for specific files
-# HTS_CFLAGS_AVX2 = @hts_cflags_avx2@
-# HTS_CFLAGS_AVX512 = @hts_cflags_avx512@
-# HTS_CFLAGS_SSE4 = @hts_cflags_sse4@
-# HTS_HAVE_NEON = @hts_have_neon@
+HTS_CFLAGS_AVX2 = 
+HTS_CFLAGS_AVX512 =
+HTS_CFLAGS_SSE4 = 
+HTS_HAVE_NEON =