diff --git a/lpSolve/src/Makevars b/lpSolve/src/Makevars
index e0c65cc..0370c40 100644
--- a/lpSolve/src/Makevars
+++ b/lpSolve/src/Makevars
@@ -1 +1,3 @@
-PKG_CPPFLAGS=-I . -DINTEGERTIME -DPARSER_LP -DBUILDING_FOR_R -DYY_NEVER_INTERACTIVE -DUSRDLL -DCLOCKTIME -DRoleIsExternalInvEngine -DINVERSE_ACTIVE=INVERSE_LUSOL -DINLINE=static -DParanoia
+PKG_CPPFLAGS = -I/usr/include/lpsolve -DINTEGERTIME -DPARSER_LP -DBUILDING_FOR_R -DYY_NEVER_INTERACTIVE -DUSRDLL -DCLOCKTIME -DRoleIsExternalInvEngine -DINVERSE_ACTIVE=INVERSE_LUSOL -DINLINE=static -DParanoia
+PKG_LIBS = -llpsolve55
+OBJECTS = init.o lpslink56.o