diff --git a/ParU/Makefile b/ParU/Makefile
index 181b8234b..ab235f066 100644
--- a/ParU/Makefile
+++ b/ParU/Makefile
@@ -56,10 +56,10 @@ all: library
 
 demos: library
 	( cd build && cmake $(CMAKE_OPTIONS) -DDEMO=1 .. && cmake --build . --config Release -j${JOBS} )
-	( cd build && ./paru_simplec < ../Matrix/b1_ss.mtx)
-	( cd build && ./paru_simple < ../Matrix/west0067.mtx )
-	( cd build && ./paru_democ < ../Matrix/west0067.mtx)
-	( cd build && ./paru_demo < ../Matrix/xenon1.mtx )
+	( cd build && ./paru_simplec$(EXEEXT) < ../Matrix/b1_ss.mtx )
+	( cd build && ./paru_simple$(EXEEXT) < ../Matrix/west0067.mtx )
+	( cd build && [ -f paru_democ$(EXEEXT) ] && ./paru_democ$(EXEEXT) < ../Matrix/west0067.mtx || true )
+	( cd build && [ -f paru_demo$(EXEEXT) ] && ./paru_demo$(EXEEXT) < ../Matrix/xenon1.mtx || true )
 
 cov:
 	( cd Tcov && $(MAKE) )