1 files changed, 3 insertions, 2 deletions

diff --git a/src/lib/libssl/test/dummytest.c b/src/lib/libssl/test/dummytest.c
index f98f003ef9..5b4467e042 100644
--- a/src/lib/libssl/test/dummytest.c
+++ b/src/lib/libssl/test/dummytest.c
@@ -8,7 +8,7 @@
 
 int main(int argc, char *argv[])
         {
-        char *p, *q, *program;
+        char *p, *q = 0, *program;
 
         p = strrchr(argv[0], '/');
         if (!p) p = strrchr(argv[0], '\\');
@@ -34,7 +34,8 @@ int main(int argc, char *argv[])
                 }
 
         for(p = program; *p; p++)
-                if (islower(*p)) *p = toupper(*p);
+                if (islower((unsigned char)(*p)))
+                        *p = toupper((unsigned char)(*p));
 
         q = strstr(program, "TEST");
         if (q > p && q[-1] == '_') q--;