diff --git a/pandaapp/src/stitch/Sources.pp b/pandaapp/src/stitch/Sources.pp
index 9801ace95c..d5f69e6b1a 100644
--- a/pandaapp/src/stitch/Sources.pp
+++ b/pandaapp/src/stitch/Sources.pp
@@ -1,3 +1,5 @@
+#define USE_PACKAGES fftw
+
 #begin bin_target
   #define TARGET stitch-command
   #define LOCAL_LIBS \