diff --git a/lib/Makefile b/lib/Makefile
index 54c5c38..f03c941 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -1,4 +1,11 @@
+MACHINE := $(shell uname -m)
+
+ifeq ($(MACHINE), x86_64)
+libdir = ${PREFIX}/lib64
+endif
+ifeq ($(MACHINE), i686)
 libdir = ${PREFIX}/lib
+endif
 
 INSTALL = install
 LIBS = libpsyc.a libpsyc.so