diff --git a/converters/Makefile b/converters/Makefile
index 376135c..db039bd 100644
--- a/converters/Makefile
+++ b/converters/Makefile
@@ -1,6 +1,6 @@
 # all of these can be over-ridden on the "make" command line if they don't suit your environment.
 
-CFLAGS="-O2 -Wall -Wshadow -Wextra -pedantic -Woverflow -Wstrict-overflow"
+CFLAGS=-O2 -Wall -Wshadow -Wextra -pedantic -Woverflow -Wstrict-overflow
 BIN=/usr/local/bin
 INSTALL=install
 CC=gcc