diff --git a/Makefile b/Makefile
index 257783a..dff49c6 100644
--- a/Makefile
+++ b/Makefile
@@ -96,7 +96,7 @@ S4r_LIBNAME = $(OBJDIR)/libS4r.a
 #### and PREFIX if you want to install boost to a different location
 
 # Specify the paths to the boost include and lib directories
-BOOST_-L$(BOOST_PREFIX)/lib/PREFIX=${CURDIR}/S4
+BOOST_PREFIX=${CURDIR}/S4
 BOOST_INC = -I$(BOOST_PREFIX)/include
 BOOST_LIBS =  -lboost_serialization
 BOOST_URL=https://sourceforge.net/projects/boost/files/boost/1.74.0/boost_1_74_0.tar.gz
@@ -352,4 +352,4 @@ S4_pyext: objdir $(S4_LIBNAME)
 	pip3 install --upgrade --use-pep517 --no-build-isolation ./
 
 clean:
-	rm -rf $(OBJDIR)
\ No newline at end of file
+	rm -rf $(OBJDIR)