--- openh323/openh323u.mak.in.prefix	2004-04-02 11:38:31.000000000 +0200
+++ openh323/openh323u.mak.in	2004-04-02 11:38:49.000000000 +0200
@@ -165,10 +165,14 @@
 
 OH323_SRCDIR = $(OPENH323DIR)/src
 ifdef PREFIX
+ifndef BUILDING_OPENH323
 OH323_INCDIR = $(PREFIX)/include/openh323
 else
 OH323_INCDIR = $(OPENH323DIR)/include
 endif
+else
+OH323_INCDIR = $(OPENH323DIR)/include
+endif
 ifndef OH323_LIBDIR
 OH323_LIBDIR = $(OPENH323DIR)/lib
 endif