diff --git a/vlib/builtin/js/builtin.v b/vlib/builtin/js/builtin.v
index bad2c32f520e96..5c2fd4676d7044 100644
--- a/vlib/builtin/js/builtin.v
+++ b/vlib/builtin/js/builtin.v
@@ -9,7 +9,7 @@ fn (a any) toString()
 // panic prints an error message, then exits the process with exit code of 1.
 @[noreturn]
 pub fn panic(s string) {
-	eprintln('V panic: ${s}')
+	eprintln('V panic: ' + s)
 	eprintln(js_stacktrace())
 	exit(1)
 }
@@ -17,7 +17,7 @@ pub fn panic(s string) {
 // panic_n prints an error message, followed by the given number, then exits the process with exit code of 1.
 @[noreturn]
 pub fn panic_n(s string, n i64) {
-	eprintln('V panic: ${s}')
+	eprintln('V panic: ' + s)
 	eprintln(js_stacktrace())
 	exit(1)
 }