diff --git a/build-aux/ltmain.sh b/build-aux/ltmain.sh
index 77963a93..c3bcdc06 100644
--- a/build-aux/ltmain.sh
+++ b/build-aux/ltmain.sh
@@ -6766,6 +6766,11 @@ func_mode_link ()
 	    elif test -n "$soname_spec"; then
 	      # bleh windows
 	      case $host in
+              x86_64-*mingw32*)
+                func_arith $current - $age
+		major=$func_arith_result
+		versuffix="6-$major"
+		;;
 	      *cygwin* | mingw* | *cegcc*)
 	        func_arith $current - $age
 		major=$func_arith_result
@@ -7499,6 +7504,14 @@ func_mode_link ()
 	  func_arith $current - $age
 	  major=$func_arith_result
 	  versuffix="-$major"
+          case $host in
+          x86_64-*mingw32*)
+             versuffix="6-$major"
+             ;;
+          *)
+             versuffix="-$major"
+             ;;
+          esac
 	  ;;
 
 	*)