diff --git a/sys/dev/usb/controller/at91dci.c b/sys/dev/usb/controller/at91dci.c
index d9f8e4066c31..fc0db86a3b85 100644
--- a/sys/dev/usb/controller/at91dci.c
+++ b/sys/dev/usb/controller/at91dci.c
@@ -894,6 +894,7 @@ at91dci_setup_standard_chain(struct usb_xfer *xfer)
 
 	/* setup temp */
 
+	temp.pc = NULL;
 	temp.td = NULL;
 	temp.td_next = xfer->td_start[0];
 	temp.offset = 0;
diff --git a/sys/dev/usb/controller/atmegadci.c b/sys/dev/usb/controller/atmegadci.c
index a864c5765c5d..1ee8423d2b24 100644
--- a/sys/dev/usb/controller/atmegadci.c
+++ b/sys/dev/usb/controller/atmegadci.c
@@ -797,6 +797,7 @@ atmegadci_setup_standard_chain(struct usb_xfer *xfer)
 
 	/* setup temp */
 
+	temp.pc = NULL;
 	temp.td = NULL;
 	temp.td_next = xfer->td_start[0];
 	temp.offset = 0;
diff --git a/sys/dev/usb/controller/avr32dci.c b/sys/dev/usb/controller/avr32dci.c
index f251f9109ae8..36980adde9a0 100644
--- a/sys/dev/usb/controller/avr32dci.c
+++ b/sys/dev/usb/controller/avr32dci.c
@@ -767,6 +767,7 @@ avr32dci_setup_standard_chain(struct usb_xfer *xfer)
 
 	/* setup temp */
 
+	temp.pc = NULL;
 	temp.td = NULL;
 	temp.td_next = xfer->td_start[0];
 	temp.offset = 0;
diff --git a/sys/dev/usb/controller/musb_otg.c b/sys/dev/usb/controller/musb_otg.c
index 60d29dd690b6..e811cae7380c 100644
--- a/sys/dev/usb/controller/musb_otg.c
+++ b/sys/dev/usb/controller/musb_otg.c
@@ -1144,6 +1144,7 @@ musbotg_setup_standard_chain(struct usb_xfer *xfer)
 
 	/* setup temp */
 
+	temp.pc = NULL;
 	temp.td = NULL;
 	temp.td_next = xfer->td_start[0];
 	temp.offset = 0;
diff --git a/sys/dev/usb/controller/uss820dci.c b/sys/dev/usb/controller/uss820dci.c
index 62fa8df4b619..fe14d513c8bf 100644
--- a/sys/dev/usb/controller/uss820dci.c
+++ b/sys/dev/usb/controller/uss820dci.c
@@ -858,6 +858,7 @@ uss820dci_setup_standard_chain(struct usb_xfer *xfer)
 
 	/* setup temp */
 
+	temp.pc = NULL;
 	temp.td = NULL;
 	temp.td_next = xfer->td_start[0];
 	temp.offset = 0;