diff --git a/static_core/plugins/ets/irtoc_scripts/string.irt b/static_core/plugins/ets/irtoc_scripts/string.irt
index 664527fc90ebc9693b1a179db97245fb0af20c87..232bd46b96f0dff4faf4ff02173bb1ad14d2c86c 100644
--- a/static_core/plugins/ets/irtoc_scripts/string.irt
+++ b/static_core/plugins/ets/irtoc_scripts/string.irt
@@ -33,6 +33,17 @@ module Constants
   WRONG_CHAR_FLAG_MASK = "0x10000UL"
 end
 
+macro(:call_runtime_slowpath_for_nonline_string) { |e, str, *args|
+
+  klass := load_class(str)
+  type := get_string_type(klass)
+  IfImm(Compare(type, Constants:LINE_STRIGN_TYPE).NE.Unlikely.b {
+    entry := LoadI(%tr).Imm(e).ptr
+    CallIndirect(entry, *args)
+  }
+}
+
+
 # It is assumed that _begin_index and _end_index are safe and does not check/normalize them.
 # The range is [_begin_index, _end_index).
 # Note, a caller of this macro must provide a corresponding 'SlowPathEntrypoint'
@@ -270,6 +281,8 @@ function(:StringTrimLeftBase,
     next
   end
 
+  call_runtime_slowpath_for_nonline_string("StringTrimLeftBase", str, unused1,  unused2).void
+
   length_packed := LoadI(str).Imm(Constants::STRING_LENGTH_OFFSET).u32
   str_data := Add(Cast(str).SrcType(Constants::COMPILER_REFERENCE).ptr, Cast(Constants::STRING_DATA_OFFSET).word).ptr
   not_compressed := AndI(length_packed).Imm(1).i32