diff --git a/decor/counters.go b/decor/counters.go
index 6bcee79..9cfe760 100644
--- a/decor/counters.go
+++ b/decor/counters.go
@@ -151,7 +151,7 @@
 //	format="% f"   output: "12.000000 MiB"
 func Current(unit interface{}, format string, wcc ...WC) Decorator {
 	if format == "" {
-		format = "%d"
+		format = "% d"
 	}
 	producer := func() DecorFunc {
 		switch unit.(type) {
diff --git a/decor/speed.go b/decor/speed.go
index 60ffefb..561fcb9 100644
--- a/decor/speed.go
+++ b/decor/speed.go
@@ -68,7 +68,7 @@
 //	unit=SizeB1000(0), format="% .1f" output: "1.0 MB/s"
 func MovingAverageSpeed(unit interface{}, format string, average ewma.MovingAverage, wcc ...WC) Decorator {
 	if format == "" {
-		format = "%.0f"
+		format = "% d"
 	}
 	d := &movingAverageSpeed{
 		WC:       initWC(wcc...),
@@ -129,7 +129,7 @@
 //	unit=SizeB1000(0), format="% .1f" output: "1.0 MB/s"
 func NewAverageSpeed(unit interface{}, format string, startTime time.Time, wcc ...WC) Decorator {
 	if format == "" {
-		format = "%.0f"
+		format = "% d"
 	}
 	d := &averageSpeed{
 		WC:        initWC(wcc...),
diff --git a/decor/speed_test.go b/decor/speed_test.go
index a004da3..9157355 100644
--- a/decor/speed_test.go
+++ b/decor/speed_test.go
@@ -20,7 +20,7 @@
 			fmt:      "",
 			current:  0,
 			elapsed:  time.Second,
-			expected: "0b/s",
+			expected: "0 b/s",
 		},
 		{
 			name:     "SizeB1024(0):%d:0b",
@@ -148,7 +148,7 @@
 			fmt:      "",
 			current:  0,
 			elapsed:  time.Second,
-			expected: "0b/s",
+			expected: "0 b/s",
 		},
 		{
 			name:     "SizeB1000(0):%d:0b",