diff --git a/Source/Makefile.in b/Source/Makefile.in
index 2937be87e..32aaabc88 100644
--- a/Source/Makefile.in
+++ b/Source/Makefile.in
@@ -29,6 +29,12 @@ include ../Makeconf
 srcdir = @srcdir@
 VPATH = @srcdir@
 
+# Installation locations
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+libdir = $(exec_prefix)/lib
+includedir = $(prefix)/include
+
 CC = @CC@
 RANLIB = @RANLIB@
 INSTALL = @INSTALL@