--- a/configure.in
+++ b/configure.in
@@ -143,7 +143,7 @@
 fi
 
 # checking for cairo
-AC_CHECK_FILE($OCAMLLIB/cairo/cairo.cmxa,CAIRO=yes,CAIRO=no)
+AC_CHECK_FILE($OCAMLLIB/cairo/cairo.cma,CAIRO=yes,CAIRO=no)
 if test "$CAIRO" = yes ; then
       INCLUDECAIRO="-I +cairo"
 fi
