diff --git a/build/make/configure.sh b/build/make/configure.sh
index 542f2f51c..47a59d08b 100644
--- a/build/make/configure.sh
+++ b/build/make/configure.sh
@@ -899,6 +899,9 @@ process_common_toolchain() {
         darwin*)
           # Enable AltiVec for macOS PPC (10.5+)
           check_cflags -maltivec && soft_enable altivec
+          # VSX is POWER7+/ppc64 only; there is no VSX build support for
+          # this toolchain, so keep RTCD from referencing *_vsx symbols.
+          enabled vsx || RTCD_OPTIONS="${RTCD_OPTIONS}--disable-vsx "
           ;;
       esac
       ;;