diff --git a/old-configure.in b/old-configure.in
index 4b5cd0f69bdf..8b91f2d12ebc 100644
--- a/old-configure.in
+++ b/old-configure.in
@@ -2084,14 +2084,14 @@ ia64*-hpux*)
         _USE_CPP_INCLUDE_FLAG=1
         _DEFINES_CFLAGS='-FI $(topobjdir)/mozilla-config.h -DMOZILLA_CLIENT'
         _DEFINES_CXXFLAGS='-FI $(topobjdir)/mozilla-config.h -DMOZILLA_CLIENT'
-        SSE_FLAGS="-arch:SSE"
-        SSE2_FLAGS="-arch:SSE2"
         CFLAGS="$CFLAGS -W3 -Gy"
         CXXFLAGS="$CXXFLAGS -W3 -Gy"
         if test "$CPU_ARCH" = "x86"; then
             dnl VS2012+ defaults to -arch:SSE2.
             CFLAGS="$CFLAGS -arch:IA32"
             CXXFLAGS="$CXXFLAGS -arch:IA32"
+            SSE_FLAGS="-arch:SSE"
+            SSE2_FLAGS="-arch:SSE2"
         fi
         dnl VS2013+ requires -FS when parallel building by make -jN.
         dnl If nothing, compiler sometimes causes C1041 error.