diff --git a/nspr.spec b/nspr.spec
index 36c8e9a..9c1ea35 100644
--- a/nspr.spec
+++ b/nspr.spec
@@ -56,6 +56,9 @@ cp %{SOURCE2} ./mozilla/nsprpub/config/
 %ifarch x86_64 ppc64 ia64 s390x sparc64
                  --enable-64bit \
 %endif
+%ifarch armv7l armv7hl armv7nhl
+                 --enable-thumb2 \
+%endif
                  --enable-optimize="$RPM_OPT_FLAGS" \
                  --disable-debug