diff --git a/audiofile.spec b/audiofile.spec
index 1073cb5..9cd17a5 100644
--- a/audiofile.spec
+++ b/audiofile.spec
@@ -3,7 +3,7 @@
 Summary: Library for accessing various audio file formats
 Name: audiofile
 Version: 0.3.6
-Release: 25%{?dist}
+Release: 26%{?dist}
 Epoch: 1
 # library is LGPL / the two programs GPL / see README
 License: LGPLv2+ and GPLv2+
@@ -28,6 +28,7 @@ Patch5: audiofile-0.3.6-pull44.patch
 Patch6: 822b732fd31ffcb78f6920001e9b1fbd815fa712.patch
 Patch7: 941774c8c0e79007196d7f1e7afdc97689f869b3.patch
 Patch8: fde6d79fb8363c4a329a184ef0b107156602b225.patch
+Patch9: integer-overflow.patch
 
 %description
 The Audio File library is an implementation of the Audio File Library
@@ -57,6 +58,7 @@ other resources you can use to develop Audio File applications.
 %patch6 -p1 -b .CVE-2018-17095
 %patch7 -p1 -b .CVE-2018-13440
 %patch8 -p1 -b .CVE-2018-13440
+%patch9 -p1 -b .integer-overflow
 
 
 %build
@@ -95,6 +97,9 @@ make check
 %{_mandir}/man3/*
 
 %changelog
+* Mon Jan 04 2021 Timm Bäder <tbaeder@redhat.com> - 1:0.3.6-26
+- Fix a integer overflow warning with gcc and error with clang
+
 * Mon Jul 27 2020 Fedora Release Engineering <releng@fedoraproject.org> - 1:0.3.6-25
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild
 
diff --git a/integer-overflow.patch b/integer-overflow.patch
new file mode 100644
index 0000000..7465463
--- /dev/null
+++ b/integer-overflow.patch
@@ -0,0 +1,12 @@
+diff -ruN audiofile-0.3.6.orig/test/Sign.cpp audiofile-0.3.6/test/Sign.cpp
+--- audiofile-0.3.6.orig/test/Sign.cpp	2021-01-04 12:50:58.563336280 +0100
++++ audiofile-0.3.6/test/Sign.cpp	2021-01-04 13:00:55.536214264 +0100
+@@ -157,7 +157,7 @@
+ 	AFframecount framesRead = afReadFrames(file, AF_DEFAULT_TRACK, readData, frameCount);
+ 	ASSERT_EQ(framesRead, frameCount);
+ 	afCloseFile(file);
+-	const uint32_t expectedData[] = { 0, -kMinInt32, kMaxUInt32 };
++	const uint32_t expectedData[] = { 0, static_cast<uint32_t>(-kMinInt32), kMaxUInt32 };
+ 	for (int i=0; i<frameCount; i++)
+ 		EXPECT_EQ(readData[i], expectedData[i]);
+ }