diff --git a/Makefile b/Makefile
index 8107aa92..4f000048 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,16 @@
+CFG1 :=`uname`
+CFG :=$(shell echo $(CFG1) | sed "s/CYGWIN.*/CYGWIN/")
+
 INPUT=../examples
 PHREEQCDAT=../database/phreeqc.dat
 WATEQ4FDAT=../database/wateq4f.dat
-PHREEQC=/cygdrive/c/Programs/phreeqcpp/Release/phreeqcpp.exe
+
 PHREEQC=../src/Release/phreeqcpp
 
+ifeq ($(CFG), CYGWIN)
+   PHREEQC=/cygdrive/c/Programs/phreeqcpp/Release/phreeqcpp.exe
+endif
+
 all: ex1.out ex2.out ex3.out ex4.out ex5.out ex6.out ex7.out ex8.out ex9.out \
 	ex10.out ex11.out ex12.out ex12a.out ex13a.out ex13b.out ex13c.out ex14.out \
 	ex15.out ex16.out ex17.out ex18.out