diff --git a/makefile b/makefile
index 3fbd5f3..8c1be70 100755
--- a/makefile
+++ b/makefile
@@ -9,7 +9,7 @@ LIBS?=
 
 DESTDIR?=
 PREFIX?=/usr/local
-EXEC_PREFIX?=$(PREFIX)
+EXEC_PREFIX?=
 INCLUDEDIR?=$(PREFIX)/include
 LIBDIR?=$(EXEC_PREFIX)/lib