Improve C89/90 compat

1 files changed, 6 insertions, 3 deletions

diff --git a/source/test/unittests/mersenne_twister_64.test.c b/source/test/unittests/mersenne_twister_64.test.c
index 80d1c2c..e523154 100644
--- a/source/test/unittests/mersenne_twister_64.test.c
+++ b/source/test/unittests/mersenne_twister_64.test.c
@@ -7,7 +7,8 @@
 enum { SIZE = 1000 };
 
 TEST("mt64 same seeds") {
-  uint64_t seed;
+  ptrdiff_t i;
+  uint64_t  seed;
   secure_random(sizeof seed, &seed);
 
   mt64_state_t foo, bar;
@@ -15,19 +16,21 @@ TEST("mt64 same seeds") {
   mt64_init(&bar, seed);
 
   int ok = 1;
-  for (ptrdiff_t i = 0; i < SIZE; i++)
+  for (i = 0; i < SIZE; i++)
     ok = ok && mt64_generate(&foo) == mt64_generate(&bar);
 
   REQUIRE(ok);
 }
 
 TEST("mt64 different seeds") {
+  ptrdiff_t i;
+
   mt64_state_t foo, bar;
   mt64_init(&foo, 42);
   mt64_init(&bar, 4242424242);
 
   ptrdiff_t difference_count = 0;
-  for (ptrdiff_t i = 0; i < SIZE; i++)
+  for (i = 0; i < SIZE; i++)
     if (mt64_generate(&foo) != mt64_generate(&bar))
       difference_count++;