diff --git a/include/common.h b/include/common.h
index e659044..b8a654a 100644
--- a/include/common.h
+++ b/include/common.h
@@ -692,8 +692,9 @@ void __attribute__((weak)) show_boot_progress (int val);
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
-#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
-#define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
+#define DIV_ROUND(n,d)		(((n) + ((d)/2)) / (d))
+#define DIV_ROUND_UP(n,d)	(((n) + (d) - 1) / (d))
+#define roundup(x, y)		((((x) + ((y) - 1)) / (y)) * (y))
 
 #define ALIGN(x,a)		__ALIGN_MASK((x),(typeof(x))(a)-1)
 #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
diff --git a/lib_generic/strmhz.c b/lib_generic/strmhz.c
index d0b6bc6..342cf2b 100644
--- a/lib_generic/strmhz.c
+++ b/lib_generic/strmhz.c
@@ -27,9 +27,11 @@ char *strmhz (char *buf, long hz)
 	long l, n;
 	long m;
 
-	n = hz / 1000000L;
+	n = DIV_ROUND(hz, 1000000L);
 	l = sprintf (buf, "%ld", n);
-	m = (hz % 1000000L) / 1000L;
+
+	hz -= n * 1000000L;
+	m = DIV_ROUND(hz, 1000L);
 	if (m != 0)
 		sprintf (buf + l, ".%03ld", m);
 	return (buf);