diff --git a/control/Makefile.am b/control/Makefile.am
index a9b8133..73dea93 100644
--- a/control/Makefile.am
+++ b/control/Makefile.am
@@ -1,5 +1,5 @@
 AM_DEFAULT_SOURCE_EXT = .cpp
-AM_CPPFLAGS = -I${top_src_dir}
+AM_CPPFLAGS = -iquote ${top_srcdir}
 
 sbin_PROGRAMS = \
 	phosphor-fan-control