diff --git a/bindings/Makefile.am b/bindings/Makefile.am
index a381d0bfd..682e17daf 100644
--- a/bindings/Makefile.am
+++ b/bindings/Makefile.am
@@ -4,7 +4,7 @@
 #
 
 AM_CPPFLAGS = @AM_CPPFLAGS@ -I$(top_srcdir)/include -I$(top_srcdir)/bindings  \
-	$(TCL_INCLUDE_SPEC)
+	$(TCL_INCLUDE_SPEC) $(PYTHON_CPPFLAGS)
 
 AM_CFLAGS = -fno-strict-aliasing
 AM_CXXFLAGS = -O2