diff --git a/src/mod/codecs/mod_ilbc/Makefile b/src/mod/codecs/mod_ilbc/Makefile
index 520c7c6c40..864cbf7369 100644
--- a/src/mod/codecs/mod_ilbc/Makefile
+++ b/src/mod/codecs/mod_ilbc/Makefile
@@ -2,7 +2,7 @@ BASE=../../../..
 ILBC_DIR=$(switch_srcdir)/libs/ilbc
 ILBC_BUILDDIR=$(switch_builddir)/libs/ilbc
 ILBCLA=$(ILBC_BUILDDIR)/src/libilbc.la
-LOCAL_CFLAGS=-I$(ILBC_DIR)/src
+LOCAL_CFLAGS=-I$(ILBC_DIR)/src -I$(ILBC_BUILDDIR)/src
 LOCAL_LIBADD=$(ILBCLA)
 
 include $(BASE)/build/modmake.rules