Index: trunk/psModules/src/imcombine/pmPSFEnvelope.c
===================================================================
--- trunk/psModules/src/imcombine/pmPSFEnvelope.c	(revision 19998)
+++ trunk/psModules/src/imcombine/pmPSFEnvelope.c	(revision 20937)
@@ -20,4 +20,6 @@
 #include "pmModelClass.h"
 #include "pmModelUtils.h"
+#include "pmSpan.h"
+#include "pmFootprint.h"
 #include "pmPeaks.h"
 #include "pmSource.h"