diff --git a/panda/src/mathutil/fftCompressor.cxx b/panda/src/mathutil/fftCompressor.cxx
index 19269922a9..4ccd73bf8f 100644
--- a/panda/src/mathutil/fftCompressor.cxx
+++ b/panda/src/mathutil/fftCompressor.cxx
@@ -34,7 +34,7 @@
 #ifdef howmany
 #undef howmany
 #endif
-#include <rfftw.h>
+#include "rfftw.h"
 
 // These FFTW support objects can only be defined if we actually have
 // the FFTW library available.