diff --git a/eclipse.spec b/eclipse.spec
index f95c723..7a52c57 100644
--- a/eclipse.spec
+++ b/eclipse.spec
@@ -27,7 +27,7 @@ Epoch:  1
 Summary:        An open, extensible IDE
 Name:           eclipse
 Version:        %{eclipse_majmin}.%{eclipse_micro}
-Release:        15%{?dist}
+Release:        16%{?dist}
 License:        EPL
 Group:          Text Editors/Integrated Development Environments (IDE)
 URL:            http://www.eclipse.org/
@@ -187,7 +187,7 @@ developing Eclipse plugins.
 %prep
 %setup -q -n eclipse-build-0_4_RC3
 cp %{SOURCE1} .
-ant applyPatches
+ant -DbuildArch=%{eclipse_arch} applyPatches
 pushd build/eclipse-R3_5_1-fetched-src
 
 # Use our system-installed javadocs, reference only what we built, and
@@ -1089,6 +1089,9 @@ fi
 #%{_libdir}/%{name}/configuration/org.eclipse.equinox.source
 
 %changelog
+* Tue Nov 10 2009 Alexander Kurtakov <akurtako@redhat.com> 1:3.5.1-16
+- Specify -DbuildArch when running ant applyPatches.
+
 * Tue Nov 10 2009 Alexander Kurtakov <akurtako@redhat.com> 1:3.5.1-15
 - Update to eclipse-build 0.4 RC3.