diff --git a/prism/ext/lpsolve55/src/lp_solve_5.5/lpsolve55/ccc.cygwin b/prism/ext/lpsolve55/src/lp_solve_5.5/lpsolve55/ccc.cygwin
index 9f9b5cd3..46694367 100644
--- a/prism/ext/lpsolve55/src/lp_solve_5.5/lpsolve55/ccc.cygwin
+++ b/prism/ext/lpsolve55/src/lp_solve_5.5/lpsolve55/ccc.cygwin
@@ -43,8 +43,8 @@ opts='-O3'
 
 if [ "$so" != "" ]
 then
-  $c -DINLINE=static -I.. -I../shared -I../bfp -I../bfp/bfp_LUSOL -I../bfp/bfp_LUSOL/LUSOL -I../colamd -s -O3 -shared -mno-cygwin -enable-stdcall-fixup -D_USRDLL -DWIN32 -DYY_NEVER_INTERACTIVE -DPARSER_LP -DINVERSE_ACTIVE=INVERSE_LUSOL -DRoleIsExternalInvEngine $src ..\lp_solve.def -o bin\$PLATFORM\lpsolve55.dll
-  $c -DINLINE=static -I.. -I../shared -I../bfp -I../bfp/bfp_LUSOL -I../bfp/bfp_LUSOL/LUSOL -I../colamd -s -O3 -shared -D_USRDLL -DWIN32 -DYY_NEVER_INTERACTIVE -DPARSER_LP -DINVERSE_ACTIVE=INVERSE_LUSOL -DRoleIsExternalInvEngine $src -o bin\$PLATFORM\liblpsolve55.so
+  $c -DINLINE=static -I.. -I../shared -I../bfp -I../bfp/bfp_LUSOL -I../bfp/bfp_LUSOL/LUSOL -I../colamd -s -O3 -shared -mno-cygwin -enable-stdcall-fixup -D_USRDLL -DWIN32 -DYY_NEVER_INTERACTIVE -DPARSER_LP -DINVERSE_ACTIVE=INVERSE_LUSOL -DRoleIsExternalInvEngine $src ../lp_solve.def -o bin/$PLATFORM/lpsolve55.dll
+  $c -DINLINE=static -I.. -I../shared -I../bfp -I../bfp/bfp_LUSOL -I../bfp/bfp_LUSOL/LUSOL -I../colamd -s -O3 -shared -D_USRDLL -DWIN32 -DYY_NEVER_INTERACTIVE -DPARSER_LP -DINVERSE_ACTIVE=INVERSE_LUSOL -DRoleIsExternalInvEngine $src -o bin/$PLATFORM/liblpsolve55.so
   mv bin/$PLATFORM/lpsolve55.dll ../../../lib
 fi