diff --git a/pysmi/borrower/pyfile.py b/pysmi/borrower/pyfile.py
index ba88d68..eae75b0 100644
--- a/pysmi/borrower/pyfile.py
+++ b/pysmi/borrower/pyfile.py
@@ -7,12 +7,17 @@
 try:
     import importlib
 
-    SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
+    try:
+        SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
+
+    except Exception:
+        raise ImportError()
 
 except ImportError:
     import imp
 
-    SOURCE_SUFFIXES = [imp.PY_SOURCE]
+    SOURCE_SUFFIXES = [s[0] for s in imp.get_suffixes()
+                       if s[2] == imp.PY_SOURCE]
 
 from pysmi.borrower.base import AbstractBorrower
 
diff --git a/pysmi/searcher/pyfile.py b/pysmi/searcher/pyfile.py
index 00fbf62..1199cf7 100644
--- a/pysmi/searcher/pyfile.py
+++ b/pysmi/searcher/pyfile.py
@@ -11,14 +11,20 @@
 try:
     import importlib
 
-    SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
-    BYTECODE_SUFFIXES = importlib.machinery.BYTECODE_SUFFIXES
+    try:
+        SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
+        BYTECODE_SUFFIXES = importlib.machinery.BYTECODE_SUFFIXES
+
+    except Exception:
+        raise ImportError()
 
 except ImportError:
     import imp
 
-    SOURCE_SUFFIXES = [imp.PY_SOURCE]
-    BYTECODE_SUFFIXES = [imp.PY_COMPILED]
+    SOURCE_SUFFIXES = [s[0] for s in imp.get_suffixes()
+                       if s[2] == imp.PY_SOURCE]
+    BYTECODE_SUFFIXES = [s[0] for s in imp.get_suffixes()
+                         if s[2] == imp.PY_COMPILED]
 
 from pysmi.searcher.base import AbstractSearcher
 from pysmi.compat import decode
diff --git a/pysmi/searcher/pypackage.py b/pysmi/searcher/pypackage.py
index 9065447..597a209 100644
--- a/pysmi/searcher/pypackage.py
+++ b/pysmi/searcher/pypackage.py
@@ -10,16 +10,22 @@
 try:
     import importlib
 
-    PY_MAGIC_NUMBER = importlib.util.MAGIC_NUMBER
-    SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
-    BYTECODE_SUFFIXES = importlib.machinery.BYTECODE_SUFFIXES
+    try:
+        PY_MAGIC_NUMBER = importlib.util.MAGIC_NUMBER
+        SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
+        BYTECODE_SUFFIXES = importlib.machinery.BYTECODE_SUFFIXES
+
+    except Exception:
+        raise ImportError()
 
 except ImportError:
     import imp
 
     PY_MAGIC_NUMBER = imp.get_magic()
-    SOURCE_SUFFIXES = [imp.PY_SOURCE]
-    BYTECODE_SUFFIXES = [imp.PY_COMPILED]
+    SOURCE_SUFFIXES = [s[0] for s in imp.get_suffixes()
+                       if s[2] == imp.PY_SOURCE]
+    BYTECODE_SUFFIXES = [s[0] for s in imp.get_suffixes()
+                         if s[2] == imp.PY_COMPILED]
 
 from pysmi.searcher.base import AbstractSearcher
 from pysmi.searcher.pyfile import PyFileSearcher
diff --git a/pysmi/writer/pyfile.py b/pysmi/writer/pyfile.py
index 672a338..3627939 100644
--- a/pysmi/writer/pyfile.py
+++ b/pysmi/writer/pyfile.py
@@ -8,15 +8,21 @@
 import sys
 import tempfile
 import py_compile
+
 try:
     import importlib
 
-    SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
+    try:
+        SOURCE_SUFFIXES = importlib.machinery.SOURCE_SUFFIXES
+
+    except Exception:
+        raise ImportError()
 
 except ImportError:
     import imp
 
-    SOURCE_SUFFIXES = [imp.PY_SOURCE]
+    SOURCE_SUFFIXES = [s[0] for s in imp.get_suffixes()
+                       if s[2] == imp.PY_SOURCE]
 
 from pysmi.writer.base import AbstractWriter
 from pysmi.compat import encode, decode