diff --git a/jedi/evaluate/helpers.py b/jedi/evaluate/helpers.py
index c5dff391..f337906e 100644
--- a/jedi/evaluate/helpers.py
+++ b/jedi/evaluate/helpers.py
@@ -194,17 +194,12 @@ def predefine_names(context, flow_scope, dct):
         del predefined[flow_scope]
 
 
-def is_compiled(context):
-    from jedi.evaluate.compiled import CompiledObject, CompiledValue
-    return isinstance(context, (CompiledObject, CompiledValue))
-
-
 def is_string(context):
     if context.evaluator.environment.version_info.major == 2:
         str_classes = (unicode, bytes)
     else:
         str_classes = (unicode,)
-    return is_compiled(context) and isinstance(context.get_safe_value(default=None), str_classes)
+    return context.is_compiled() and isinstance(context.get_safe_value(default=None), str_classes)
 
 
 def is_literal(context):
@@ -212,7 +207,7 @@ def is_literal(context):
 
 
 def _get_safe_value_or_none(context, accept):
-    if is_compiled(context):
+    if context.is_compiled():
         value = context.get_safe_value(default=None)
         if isinstance(value, accept):
             return value
diff --git a/jedi/evaluate/syntax_tree.py b/jedi/evaluate/syntax_tree.py
index 7f4a2cd3..f3f7c015 100644
--- a/jedi/evaluate/syntax_tree.py
+++ b/jedi/evaluate/syntax_tree.py
@@ -21,7 +21,7 @@ from jedi.evaluate.context import ClassContext, FunctionContext
 from jedi.evaluate.context import iterable
 from jedi.evaluate.context import TreeInstance
 from jedi.evaluate.finder import NameFinder
-from jedi.evaluate.helpers import is_string, is_literal, is_number, is_compiled
+from jedi.evaluate.helpers import is_string, is_literal, is_number
 from jedi.evaluate.compiled.access import COMPARISON_OPERATORS
 from jedi.evaluate.cache import evaluator_method_cache
 from jedi.evaluate.gradual.stub_context import VersionInfo
@@ -483,7 +483,7 @@ def _eval_comparison_part(evaluator, context, left, operator, right):
         # `int() % float()`.
         return ContextSet([left])
     elif str_operator in COMPARISON_OPERATORS:
-        if is_compiled(left) and is_compiled(right):
+        if left.is_compiled() and right.is_compiled():
             # Possible, because the return is not an option. Just compare.
             try:
                 return ContextSet([left.execute_operation(right, str_operator)])