diff --git a/freeglut/freeglut/progs/demos/Fractals/Makefile.am b/freeglut/freeglut/progs/demos/Fractals/Makefile.am
index 0d5ad82..8be8276 100644
--- a/freeglut/freeglut/progs/demos/Fractals/Makefile.am
+++ b/freeglut/freeglut/progs/demos/Fractals/Makefile.am
@@ -2,4 +2,4 @@ EXTRA_DIST = Fractals.dsp fractals.c fractals.dat
 noinst_PROGRAMS = fractals
 fractals_SOURCES = fractals.c
 fractals_LDFLAGS = -export-dynamic ../../../src/lib@LIBRARY@.la
-fractals_CFLAGS = -I../../../include $(X_CFLAGS)
+fractals_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)
diff --git a/freeglut/freeglut/progs/demos/Fractals_random/Makefile.am b/freeglut/freeglut/progs/demos/Fractals_random/Makefile.am
index 9e97b35..9dc66b9 100644
--- a/freeglut/freeglut/progs/demos/Fractals_random/Makefile.am
+++ b/freeglut/freeglut/progs/demos/Fractals_random/Makefile.am
@@ -3,4 +3,4 @@ EXTRA_DIST = Fractals_random.dsp fractals.dat fractals_random.c
 noinst_PROGRAMS = fractals_random
 fractals_random_SOURCES = fractals_random.c
 fractals_random_LDFLAGS = -export-dynamic ../../../src/lib@LIBRARY@.la
-fractals_random_CFLAGS = -I../../../include $(X_CFLAGS)
+fractals_random_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)
diff --git a/freeglut/freeglut/progs/demos/Lorenz/Makefile.am b/freeglut/freeglut/progs/demos/Lorenz/Makefile.am
index 7bebf29..0d61044 100644
--- a/freeglut/freeglut/progs/demos/Lorenz/Makefile.am
+++ b/freeglut/freeglut/progs/demos/Lorenz/Makefile.am
@@ -3,4 +3,4 @@ EXTRA_DIST = lorenz.c lorenz.dsp
 noinst_PROGRAMS = lorenz
 lorenz_SOURCES = lorenz.c
 lorenz_LDFLAGS = -export-dynamic ../../../src/lib@LIBRARY@.la
-lorenz_CFLAGS = -I../../../include $(X_CFLAGS)
+lorenz_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)
diff --git a/freeglut/freeglut/progs/demos/One/Makefile.am b/freeglut/freeglut/progs/demos/One/Makefile.am
index a0bba62..7f5906c 100644
--- a/freeglut/freeglut/progs/demos/One/Makefile.am
+++ b/freeglut/freeglut/progs/demos/One/Makefile.am
@@ -2,4 +2,4 @@ EXTRA_DIST = one.c one.dsp
 noinst_PROGRAMS = one
 one_SOURCES = one.c
 one_LDFLAGS = -export-dynamic ../../../src/lib@LIBRARY@.la
-one_CFLAGS = -I../../../include $(X_CFLAGS)
+one_CFLAGS = -I$(top_srcdir)/include $(X_CFLAGS)