diff --git a/src/tscore/Makefile.am b/src/tscore/Makefile.am
index 24c1b63fa1b..43750b2a739 100644
--- a/src/tscore/Makefile.am
+++ b/src/tscore/Makefile.am
@@ -207,7 +207,7 @@ freelist_benchmark_SOURCES = unit_tests/freelist_benchmark.cc
 CompileParseRules_SOURCES = CompileParseRules.cc
 
 CompileParseRules$(BUILD_EXEEXT): $(CompileParseRules_OBJECTS)
-	$(CXX_FOR_BUILD) $(AM_CXXFLAGS) -I$(top_builddir)/include -I$(abs_top_srcdir)/include -o $@ $(abs_top_srcdir)/src/tscore/CompileParseRules.cc
+	$(CXX_FOR_BUILD) $(AM_CXXFLAGS) $(CPPFLAGS) -I$(top_builddir)/include -I$(abs_top_srcdir)/include -o $@ $(abs_top_srcdir)/src/tscore/CompileParseRules.cc
 
 clean-local:
 	rm -f ParseRulesCType ParseRulesCTypeToLower ParseRulesCTypeToUpper