diff --git a/libgtop2.spec b/libgtop2.spec
index 7e964ff..7f59f84 100644
--- a/libgtop2.spec
+++ b/libgtop2.spec
@@ -22,7 +22,7 @@ such as their PID, memory usage, etc.
 %package devel
 Summary:  Libraries and include files for developing with libgtop
 Group:    Development/Libraries
-Requires: %{name} = %{version}-%{release}
+Requires: %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
 This package provides the necessary development libraries and include
@@ -68,6 +68,7 @@ find $RPM_BUILD_ROOT -name '*.la' -exec rm -f {} ';'
 %changelog
 * Mon Aug 10 2015 David King <amigadave@amigadave.com> - 2.31.4-1
 - Update to 2.31.4
+- Tighten dependency on subpackages
 
 * Mon Jun 22 2015 David King <amigadave@amigadave.com> - 2.31.3-1
 - Update to 2.31.3