diff --git a/python-rpm-generators.spec b/python-rpm-generators.spec
index ef80ad4..64bc193 100644
--- a/python-rpm-generators.spec
+++ b/python-rpm-generators.spec
@@ -1,7 +1,7 @@
 Name:           python-rpm-generators
 Summary:        Dependency generators for Python RPMs
 Version:        12
-Release:        10%{?dist}
+Release:        11%{?dist}
 
 # Originally all those files were part of RPM, so license is kept here
 License:        GPLv2+
@@ -47,6 +47,9 @@ install -Dpm0755 -t %{buildroot}%{_rpmconfigdir} *.py
 %{_rpmconfigdir}/pythonbundles.py
 
 %changelog
+* Sun Dec 19 2021 Gordon Messmer <gordon.messmer@gmail.com> - 12-11
+- Handle legacy version specifiers that would previously raise exceptions.
+
 * Fri Oct 29 2021 Gordon Messmer <gordon.messmer@gmail.com> - 12-10
 - Additional fix for dev releases.
 
diff --git a/pythondistdeps.py b/pythondistdeps.py
index 2e4c9c3..8ae142d 100755
--- a/pythondistdeps.py
+++ b/pythondistdeps.py
@@ -138,6 +138,9 @@ class RpmVersion():
             # in public releases
             # https://www.python.org/dev/peps/pep-0440/#local-version-identifiers
 
+    def is_legacy(self):
+        return isinstance(self.version, str)
+
     def increment(self):
         self.version[-1] += 1
         self.pre = None
@@ -146,7 +149,7 @@ class RpmVersion():
         return self
 
     def __str__(self):
-        if isinstance(self.version, str):
+        if self.is_legacy():
             return self.version
         if self.epoch:
             rpm_epoch = str(self.epoch) + ':'
@@ -172,6 +175,11 @@ def convert_compatible(name, operator, version_id):
         print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
         exit(65)  # os.EX_DATAERR
     version = RpmVersion(version_id)
+    if version.is_legacy():
+        # LegacyVersions are not supported in this context
+        print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
+        print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
+        exit(65)  # os.EX_DATAERR
     if len(version.version) == 1:
         print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
         print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
@@ -204,6 +212,11 @@ def convert_not_equal(name, operator, version_id):
     if version_id.endswith('.*'):
         version_id = version_id[:-2]
         version = RpmVersion(version_id)
+        if version.is_legacy():
+            # LegacyVersions are not supported in this context
+            print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
+            print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
+            exit(65)  # os.EX_DATAERR
         version_gt = RpmVersion(version_id).increment()
         version_gt_operator = '>='
         # Prevent dev and pre-releases from satisfying a < requirement
@@ -235,12 +248,14 @@ def convert_ordered(name, operator, version_id):
             operator = '<'
     else:
         version = RpmVersion(version_id)
-    # Prevent dev and pre-releases from satisfying a < requirement
-    if operator == '<' and not version.pre and not version.dev and not version.post:
-        version = '{}~~'.format(version)
-    # Prevent post-releases from satisfying a > requirement
-    if operator == '>' and not version.pre and not version.dev and not version.post:
-        version = '{}.0'.format(version)
+    # For backwards compatibility, fallback to previous behavior with LegacyVersions
+    if not version.is_legacy():
+        # Prevent dev and pre-releases from satisfying a < requirement
+        if operator == '<' and not version.pre and not version.dev and not version.post:
+            version = '{}~~'.format(version)
+        # Prevent post-releases from satisfying a > requirement
+        if operator == '>' and not version.pre and not version.dev and not version.post:
+            version = '{}.0'.format(version)
     return '{} {} {}'.format(name, operator, version)