diff --git a/SOURCES/sip6-fix-exception-handling.patch b/SOURCES/sip6-fix-exception-handling.patch
new file mode 100644
index 0000000..7bea2c3
--- /dev/null
+++ b/SOURCES/sip6-fix-exception-handling.patch
@@ -0,0 +1,12 @@
+diff --git a/sipbuild/generator/parser/rules.py b/sipbuild/generator/parser/rules.py
+index c221ad7..e79e1b8 100644
+--- a/sipbuild/generator/parser/rules.py
++++ b/sipbuild/generator/parser/rules.py
+@@ -2293,6 +2293,7 @@ def p_opt_base_exception(p):
+ 
+     if len(p) == 4:
+         base = p[2]
++        base.make_absolute()
+ 
+         # See if it is a project-defined exception.
+         for xd in p.parser.pm.spec.exceptions:
diff --git a/SPECS/sip6.spec b/SPECS/sip6.spec
index d3a66ad..fde436c 100644
--- a/SPECS/sip6.spec
+++ b/SPECS/sip6.spec
@@ -2,7 +2,7 @@
 
 Name:           sip6
 Version:        6.6.2
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        SIP - Python/C++ Bindings Generator
 %py_provides    python3-sip6
 
@@ -12,6 +12,9 @@ URL:            https://www.riverbankcomputing.com/software/sip
 Source0:        %{pypi_source}
 Patch0:         323d39a2d602
 
+# Bug 2225259 - regression bug when using sub-classed C++ exceptions
+Patch1:         sip6-fix-exception-handling.patch
+
 BuildRequires:  gcc
 BuildRequires:  python3-devel
 BuildRequires:  %{py3_dist packaging ply setuptools toml}
@@ -46,6 +49,10 @@ Python bindings for wxWidgets.}
 %{python3_sitearch}/sipbuild/
 
 %changelog
+* Tue Jul 25 2023 Jan Grulich <jgrulich@redhat.com> - 6.6.2-2
+- Fixed the handling of exceptions that sub-class C++ exceptions
+  Resolves: bz#2225259
+
 * Mon Oct 24 2022 Jan Grulich <jgrulich@redhat.com> - 6.6.2-1
 - 6.6.2
   Resolves: bz#2118862