diff --git a/Makefile b/Makefile
index 35520010b..f8c0c525f 100644
--- a/Makefile
+++ b/Makefile
@@ -7,8 +7,9 @@
 .PHONY: clean cleandist
 COREDEPSINCLUDE = -Idependencies/rapidjson/include -Idependencies/sajson/include -Idependencies/cJSON  -Idependencies/jsmn
 EXTRADEPSINCLUDE =  -Idependencies/jsoncppdist -Idependencies/json11 -Idependencies/fastjson/src -Idependencies/fastjson/include -Idependencies/gason/src -Idependencies/ujson4c/3rdparty -Idependencies/ujson4c/src
-CXXFLAGS =  -std=c++17  -march=native -Wall -Wextra -Wshadow -Iinclude  -Ibenchmark/linux
-CFLAGS = -march=native  -Idependencies/ujson4c/3rdparty -Idependencies/ujson4c/src
+# users can provide their own additional flags with make EXTRAFLAGS=something
+CXXFLAGS =  -std=c++17  -march=native -Wall -Wextra -Wshadow -Iinclude  -Ibenchmark/linux $(EXTRAFLAGS)
+CFLAGS = -march=native  -Idependencies/ujson4c/3rdparty -Idependencies/ujson4c/src $(EXTRAFLAGS)
 
 # This is a convenience flag
 ifdef SANITIZEGOLD
diff --git a/src/stage1_find_marks.cpp b/src/stage1_find_marks.cpp
index 2e6697036..5ee7ca231 100644
--- a/src/stage1_find_marks.cpp
+++ b/src/stage1_find_marks.cpp
@@ -452,7 +452,6 @@ really_inline void flatten_bits(uint32_t *base_ptr, uint32_t &base,
       out_ptr[0] = idx + trailingzeroes(bits);
       bits = bits & (bits - 1);
       out_ptr++;
-    }
   }
   base = (out_ptr - base_ptr);
 }