diff --git a/iguana/exchanges/LP_include.h b/iguana/exchanges/LP_include.h
index 7c10880f2..a306dde6b 100644
--- a/iguana/exchanges/LP_include.h
+++ b/iguana/exchanges/LP_include.h
@@ -23,7 +23,7 @@
 
 #ifdef FROM_JS
 #include <emscripten.h>
-#define sleep(x) emscripten_sleep(x)
+#define sleep(x) emscripten_sleep((x) * 1000)
 void emscripten_usleep(int32_t x);
 #define usleep(x) emscripten_usleep(x)
 
diff --git a/iguana/exchanges/m_js b/iguana/exchanges/m_js
index c173788af..fb99a2126 100755
--- a/iguana/exchanges/m_js
+++ b/iguana/exchanges/m_js
@@ -1,4 +1,4 @@
 cd ..
 echo building...
-emcc -s ASSERTIONS=1 -s ASYNCIFY=1 -s TOTAL_MEMORY=134217728 --preload-file coins.json -DFROM_JS -O2 -I../includes -I../crypto777 -s PTHREAD_POOL_SIZE=8 -s USE_PTHREADS=2 -o /var/www/html/index.html exchanges/mm.c ../crypto777/*.c ../crypto777/jpeg/*.c ../crypto777/jpeg/unix/*.c mini-gmp.c secp256k1/src/secp256k1.c -lm ../OSlibs/js/libnanomsg.a -lc -lpthread
+emcc -s ASSERTIONS=1 -s ASYNCIFY=1 -s TOTAL_MEMORY=134217728 --preload-file coins.json -DFROM_JS -O2 -I../includes -I../crypto777 -s PTHREAD_POOL_SIZE=8 -s USE_PTHREADS=1 -o /var/www/html/index.html exchanges/mm.c ../crypto777/*.c ../crypto777/jpeg/*.c ../crypto777/jpeg/unix/*.c mini-gmp.c secp256k1/src/secp256k1.c -lm ../OSlibs/js/libnanomsg.a -lc -lpthread