diff --git a/src/add-ons/media/media-add-ons/usb_webcam/Jamfile b/src/add-ons/media/media-add-ons/usb_webcam/Jamfile
index 5bd15cd637..994f6e6a0b 100644
--- a/src/add-ons/media/media-add-ons/usb_webcam/Jamfile
+++ b/src/add-ons/media/media-add-ons/usb_webcam/Jamfile
@@ -71,7 +71,7 @@ rule USBWebcamHeaderGen header : macro : sources
 
 actions USBWebcamHeaderGen1
 {
-	grep -h $(GREP_DEFINE) $(2) > $(1) ;
+	grep -h -a $(GREP_DEFINE) $(2) > $(1) ;
 }
 
 USBWebcamHeaderGen CamInternalAddons.h : B_WEBCAM_MKINTFUNC : $(addonSources) ;