diff --git a/Makefile b/Makefile
index e108bd8..b0e7413 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ LDFLAGS=-lm
 PREFIX= /usr/local
 
 WINDOWS_CC=x86_64-w64-mingw32-gcc
-WINDOWS_CFLAGS= -Wall -O3 -ansi -pedantic-errors
+WINDOWS_CFLAGS= -Wall -O3 -ansi -pedantic-errors -pthread
 WINDOWS_PLATFORM= windows
 
 .DEFAULT_GOAL := build/opt-pricer
diff --git a/build/opt-pricer b/build/opt-pricer
new file mode 100755
index 0000000..5912ba0
Binary files /dev/null and b/build/opt-pricer differ