diff --git a/gcc.yml b/gcc.yml
index a935140984d3548a2554be6814e6dab00951e679..dd6168133744d50eb9b301cb86ec9df8fb5d116e 100644
--- a/gcc.yml
+++ b/gcc.yml
@@ -5,7 +5,10 @@ compiler:
   runner_path:     'runners/'
   build_path:      &build_path 'build/'
   options:
-    - -c
+    - '-c'
+    - '-Wall'
+    - -std=c99
+    - -pedantic
   includes:
     prefix: '-I'
     items:
diff --git a/src/unity.c b/src/unity.c
index 470d3bf7014c9b045049e8c64a13e87651ec7de8..708ddf18845d979fc52cbff23e3f7faa098b7e1f 100644
--- a/src/unity.c
+++ b/src/unity.c
@@ -12,7 +12,7 @@ struct _Unity Unity =
     0,
     0,
     1e-4f,
-    0,
+    {0},
 };
 
 void UnityPrintChar(const char ch)