diff --git a/.gitignore b/.gitignore
index 78c6209..c5ff59e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,3 +55,4 @@ clog
 /OpenImageIO-1.7.17.tar.gz
 /OpenImageIO-1.8.5.tar.gz
 /OpenImageIO-1.8.6.tar.gz
+/OpenImageIO-1.8.7.tar.gz
diff --git a/OpenImageIO.spec b/OpenImageIO.spec
index 88085e0..9063a2d 100644
--- a/OpenImageIO.spec
+++ b/OpenImageIO.spec
@@ -2,7 +2,7 @@
 #global beta beta1
 
 Name:           OpenImageIO
-Version:        1.8.6
+Version:        1.8.7
 Release:        1%{?dist}
 Summary:        Library for reading and writing images
 
@@ -15,7 +15,7 @@ Source0:        https://github.com/%{name}/%{subname}/archive/Release-%{version}
 #Source1:        oiio-images.tar.gz
 
 Patch0:         OpenImageIO-man.patch
-Patch1:         OpenImageIO-dcmtk.patch
+#Patch1:         OpenImageIO-dcmtk.patch
 Patch2:         OpenImageIO-as_needed.patch
 Patch3:         OpenImageIO-GLES.patch
 
@@ -36,7 +36,10 @@ BuildRequires:  libwebp-devel
 BuildRequires:  Field3D-devel
 %endif
 BuildRequires:  hdf5-devel
+# Builds fail for 32bit systems.
+%ifnarch i686 armv7hl
 BuildRequires:  dcmtk-devel
+%endif
 BuildRequires:  zlib-devel
 BuildRequires:  jasper-devel
 BuildRequires:  pugixml-devel
@@ -199,6 +202,11 @@ cp -a src/doc/*.1 %{buildroot}%{_mandir}/man1
 
 
 %changelog
+* Wed Jan 03 2018 Richard Shaw <hobbes1069@gmail.com> - 1.8.7-1
+- Update to latest upstream release.
+- Disable building with dcmtk until fixed, see:
+  https://github.com/OpenImageIO/oiio/issues/1841
+
 * Thu Nov 02 2017 Richard Shaw <hobbes1069@gmail.com> - 1.8.6-1
 - Update to latest upstream release.
 - Add dcmtk to build to enable DICOM plugin.
diff --git a/sources b/sources
index ffdd3b0..ee0bb9a 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (OpenImageIO-1.8.6.tar.gz) = c74d6bf6dc4dea5c48d8c9ce1320ff14b07b41d0c54cacf2e6c3561e28eb0819f534ff9f49af1a484caf8ef2f21f14abfaf70b22ce5472da593c8f0bc6570775
+SHA512 (OpenImageIO-1.8.7.tar.gz) = d31e2790798959572f02de26111805b4bb5a26f73252d2f222f749e867354ca93e292738c04a36769f08c35d9b26605d1fdf66d96b2de5928d8e726bb819e963