diff --git a/ext/mpeg2dec/Makefile.am b/ext/mpeg2dec/Makefile.am
index d283793d57..de632398fd 100644
--- a/ext/mpeg2dec/Makefile.am
+++ b/ext/mpeg2dec/Makefile.am
@@ -3,7 +3,7 @@ plugindir = $(libdir)/gst
 plugin_LTLIBRARIES = libgstmpeg2dec.la
 
 if HAVE_CPU_I386
-ARCHFLAGS = -m486
+ARCHFLAGS = -mcpu=i486
 else
 ARCHFLAGS = 
 endif