diff --git a/legacy/embryo/configure.in b/legacy/embryo/configure.in
index 05aef87817..92c0720637 100644
--- a/legacy/embryo/configure.in
+++ b/legacy/embryo/configure.in
@@ -75,6 +75,9 @@ else
 fi
 AC_SUBST(PACKAGE_DATA_DIR)
 	
+embryoincludedir='${datadir}/include'
+AC_SUBST(embryoincludedir)
+
 AC_OUTPUT([
 Makefile
 embryo.pc
diff --git a/legacy/embryo/embryo.pc.in b/legacy/embryo/embryo.pc.in
index afd528a2cb..70fb587c00 100644
--- a/legacy/embryo/embryo.pc.in
+++ b/legacy/embryo/embryo.pc.in
@@ -1,11 +1,12 @@
 prefix=@prefix@
 exec_prefix=@exec_prefix@
+datadir=@PACKAGE_DATA_DIR@
 libdir=@libdir@
 includedir=@includedir@
+embryoincludedir=@embryoincludedir@
 
 Name: embryo
 Description: A small virtual machine engine and bytecode compiler
 Version: @VERSION@
 Libs: -L${libdir} -lembryo -lm
 Cflags: -I${includedir}
-