diff --git a/src/configure.in b/src/configure.in
index 2a71f42..aedd73a 100644
--- a/src/configure.in
+++ b/src/configure.in
@@ -136,7 +136,7 @@
   elif test "x$MACARCH" = "xintel"; then
     CPPFLAGS="$CPPFLAGS -arch intel"
     LDFLAGS="$LDFLAGS -arch intel"
-  else
+  elif test "x$MACARCH" = "xppc"; then
     CPPFLAGS="$CPPFLAGS -arch ppc"
     LDFLAGS="$LDFLAGS -arch ppc"
   fi