diff --git a/internal/sysfs/osfile.go b/internal/sysfs/osfile.go
index 490f0fa681..1930f3c796 100644
--- a/internal/sysfs/osfile.go
+++ b/internal/sysfs/osfile.go
@@ -254,7 +254,7 @@ func (f *osFile) Pwrite(buf []byte, off int64) (n int, errno experimentalsys.Err
 
 // Truncate implements the same method as documented on sys.File
 func (f *osFile) Truncate(size int64) (errno experimentalsys.Errno) {
-	if errno = experimentalsys.UnwrapOSError(f.file.Truncate(size)); errno != 0 {
+	if errno = experimentalsys.UnwrapOSError(truncate(f.file, size)); errno != 0 {
 		// Defer validation overhead until we've already had an error.
 		errno = fileError(f, f.closed, errno)
 	}
diff --git a/internal/sysfs/truncate.go b/internal/sysfs/truncate.go
new file mode 100644
index 0000000000..44a27202b1
--- /dev/null
+++ b/internal/sysfs/truncate.go
@@ -0,0 +1,9 @@
+//go:build !tinygo
+
+package sysfs
+
+import "os"
+
+func truncate(file *os.File, size int64) error {
+	return file.Truncate(size)
+}
diff --git a/internal/sysfs/truncate_tinygo.go b/internal/sysfs/truncate_tinygo.go
new file mode 100644
index 0000000000..1bd36f9a54
--- /dev/null
+++ b/internal/sysfs/truncate_tinygo.go
@@ -0,0 +1,9 @@
+//go:build tinygo
+
+package sysfs
+
+import "os"
+
+func truncate(file *os.File, size int64) error {
+	return nil
+}