diff --git a/vlib/builtin/float.c.v b/vlib/builtin/float.c.v
index 2a2481688a..ac489dc495 100644
--- a/vlib/builtin/float.c.v
+++ b/vlib/builtin/float.c.v
@@ -85,10 +85,10 @@ pub fn (x f32) str() string {
 			f: x
 		}
 		if f.u == strconv.single_minus_zero {
-			return '-0.'
+			return '-0.0'
 		}
 		if f.u == strconv.single_plus_zero {
-			return '0.'
+			return '0.0'
 		}
 	}
 	abs_x := f32_abs(x)
diff --git a/vlib/builtin/float_test.v b/vlib/builtin/float_test.v
index 1a68bb6386..d2514c5a38 100644
--- a/vlib/builtin/float_test.v
+++ b/vlib/builtin/float_test.v
@@ -228,3 +228,12 @@ fn test_float_point_formatting_rounding() {
 	assert '${-239.55555555555:0.1f}' == '-239.6'
 	assert '${-239.55555555555:0.0f}' == '-240'
 }
+
+fn test_float_zero_str() {
+	f1 := f32(0.0)
+	f2 := 0.0
+	assert f1.str() == '0.0'
+	assert '$f1' == '0.0'
+	assert f2.str() == '0.0'
+	assert '$f2' == '0.0'
+}