diff --git a/pkg/core/fee/opcode.go b/pkg/core/fee/opcode.go
index b9c788dbc..806ee1a8d 100644
--- a/pkg/core/fee/opcode.go
+++ b/pkg/core/fee/opcode.go
@@ -164,7 +164,7 @@ var coefficients = map[opcode.Opcode]int64{
 	opcode.DIV:          1 << 3,
 	opcode.MOD:          1 << 3,
 	opcode.POW:          1 << 6,
-	opcode.SQRT:         1 << 11,
+	opcode.SQRT:         1 << 6,
 	opcode.SHL:          1 << 3,
 	opcode.SHR:          1 << 3,
 	opcode.NOT:          1 << 2,