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-rw-r--r--src/IO/Makefile.am4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/IO/Makefile.am b/src/IO/Makefile.am
index b168073c..c889dae8 100644
--- a/src/IO/Makefile.am
+++ b/src/IO/Makefile.am
@@ -1,4 +1,6 @@
-AM_CPPFLAGS=-DDILLO_BINDIR='"$(bindir)/"'
+AM_CPPFLAGS = \
+ -I$(top_srcdir) \
+ -DDILLO_BINDIR='"$(bindir)/"'
AM_CFLAGS = @LIBFLTK_CFLAGS@
AM_CXXFLAGS = @LIBFLTK_CXXFLAGS@