diff --git a/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-25b.c b/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-25b.c
index 2cb4361dc0010ca39d8e394de4dc812cbcda38f3..5d557360ab3038360978e081ecc84a372eb666e5 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-25b.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-25b.c
@@ -5,7 +5,7 @@
 /* Test to make sure unrelated arguments and comparisons
    don't get optimized incorrectly. */
 
-__UINT16_TYPE__ short test_bswap16(__UINT16_TYPE__ x, __UINT16_TYPE__ y)
+__UINT16_TYPE__ test_bswap16(__UINT16_TYPE__ x, __UINT16_TYPE__ y)
 {
   return x ? __builtin_bswap16(y) : 0;
 }