diff --git a/Makefile.am b/Makefile.am
index 6bb5c47..51d2d81 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -4,3 +4,5 @@ libobstack_la_SOURCES = obstack.c
 libobstack_la_HEADERS = obstack.h
 libobstack_ladir = $(includedir)
 ACLOCAL_AMFLAGS = -Im4
+
+pkgconfig_DATA = musl-obstack.pc
diff --git a/configure.ac b/configure.ac
index 86ae97e..1e83f57 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,5 +12,7 @@ AC_PROG_LIBTOOL
 
 AC_CHECK_HEADERS(stddef.h stdio.h stdint.h inttypes.h)
 
+PKG_INSTALLDIR
+
 AC_CONFIG_FILES([Makefile musl-obstack.pc])
 AC_OUTPUT
diff --git a/musl-obstack.pc.in b/musl-obstack.pc.in
index 184ffc3..54a6307 100644
--- a/musl-obstack.pc.in
+++ b/musl-obstack.pc.in
@@ -1,7 +1,7 @@
-prefix=/usr
-exec_prefix=${prefix}
-libdir=${prefix}/lib
-includedir=${prefix}/include
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
 
 Name: musl-obstack
 Description: Implementation of obstack functions for musl libc