Index: uspace/lib/c/generic/double_to_str.c
===================================================================
--- uspace/lib/c/generic/double_to_str.c	(revision 15674715412ae9b74ef57bcf964741ea2f00c1bb)
+++ uspace/lib/c/generic/double_to_str.c	(revision b251af5abe66adbf5b601cda4d7ebbebe90926f8)
@@ -503,5 +503,5 @@
 {
 	/* The whole computation assumes 64bit significand. */
-	static_assert(sizeof(ieee_val.pos_val.significand) == sizeof(uint64_t));
+	static_assert(sizeof(ieee_val.pos_val.significand) == sizeof(uint64_t), "");
 
 	if (ieee_val.is_special) {
@@ -754,5 +754,5 @@
 {
 	/* The whole computation assumes 64bit significand. */
-	static_assert(sizeof(ieee_val.pos_val.significand) == sizeof(uint64_t));
+	static_assert(sizeof(ieee_val.pos_val.significand) == sizeof(uint64_t), "");
 
 	if (ieee_val.is_special) {
Index: uspace/lib/c/generic/ieee_double.c
===================================================================
--- uspace/lib/c/generic/ieee_double.c	(revision 15674715412ae9b74ef57bcf964741ea2f00c1bb)
+++ uspace/lib/c/generic/ieee_double.c	(revision b251af5abe66adbf5b601cda4d7ebbebe90926f8)
@@ -45,5 +45,5 @@
 	const int exponent_bias = 1075;
 
-	static_assert(sizeof(val) == sizeof(uint64_t));
+	static_assert(sizeof(val) == sizeof(uint64_t), "");
 
 	union {
Index: uspace/lib/c/generic/time.c
===================================================================
--- uspace/lib/c/generic/time.c	(revision 15674715412ae9b74ef57bcf964741ea2f00c1bb)
+++ uspace/lib/c/generic/time.c	(revision b251af5abe66adbf5b601cda4d7ebbebe90926f8)
@@ -79,5 +79,5 @@
 clock_t clock(void)
 {
-	static_assert(CLOCKS_PER_SEC == 1000000);
+	static_assert(CLOCKS_PER_SEC == 1000000, "");
 
 	size_t count;