Index: uspace/drv/bus/usb/ehci/hw_struct/transfer_descriptor.h
===================================================================
--- uspace/drv/bus/usb/ehci/hw_struct/transfer_descriptor.h	(revision f47c2dc1dbaada74870807f3cccd5bee0e6b69ff)
+++ uspace/drv/bus/usb/ehci/hw_struct/transfer_descriptor.h	(revision 0a520dbcbe002e3bee1e5237bae6dd02ac81b717)
@@ -88,5 +88,5 @@
 #define TD_BUFFER_POINTER_OFFSET_MASK    0xfff
 
-static_assert(sizeof(td_t) % 32 == 0);
+static_assert(sizeof(td_t) % 32 == 0, "");
 
 static inline bool td_active(const td_t *td)
Index: uspace/drv/bus/usb/ohci/hw_struct/hcca.h
===================================================================
--- uspace/drv/bus/usb/ohci/hw_struct/hcca.h	(revision f47c2dc1dbaada74870807f3cccd5bee0e6b69ff)
+++ uspace/drv/bus/usb/ohci/hw_struct/hcca.h	(revision 0a520dbcbe002e3bee1e5237bae6dd02ac81b717)
@@ -61,5 +61,5 @@
 } hcca_t;
 
-static_assert(sizeof(hcca_t) == 256);
+static_assert(sizeof(hcca_t) == 256, "");
 
 /** Allocate properly aligned structure.
Index: uspace/drv/bus/usb/uhci/uhci_batch.c
===================================================================
--- uspace/drv/bus/usb/uhci/uhci_batch.c	(revision f47c2dc1dbaada74870807f3cccd5bee0e6b69ff)
+++ uspace/drv/bus/usb/uhci/uhci_batch.c	(revision 0a520dbcbe002e3bee1e5237bae6dd02ac81b717)
@@ -96,5 +96,5 @@
 int uhci_transfer_batch_prepare(uhci_transfer_batch_t *uhci_batch)
 {
-	static_assert((sizeof(td_t) % 16) == 0);
+	static_assert((sizeof(td_t) % 16) == 0, "");
 
 	usb_transfer_batch_t *usb_batch = &uhci_batch->base;
Index: uspace/drv/bus/usb/xhci/trb_ring.c
===================================================================
--- uspace/drv/bus/usb/xhci/trb_ring.c	(revision f47c2dc1dbaada74870807f3cccd5bee0e6b69ff)
+++ uspace/drv/bus/usb/xhci/trb_ring.c	(revision 0a520dbcbe002e3bee1e5237bae6dd02ac81b717)
@@ -53,5 +53,5 @@
 } __attribute__((aligned(PAGE_SIZE)));
 
-static_assert(sizeof(trb_segment_t) == PAGE_SIZE);
+static_assert(sizeof(trb_segment_t) == PAGE_SIZE, "");
 
 /**