diff --git a/workspace_tools/toolchains/gcc.py b/workspace_tools/toolchains/gcc.py
index c4e8f5c771..e864c7a7a3 100644
--- a/workspace_tools/toolchains/gcc.py
+++ b/workspace_tools/toolchains/gcc.py
@@ -47,7 +47,8 @@ class GCC(mbedToolchain):
         
         # Note: We are using "-O2" instead of "-Os" to avoid this known GCC bug:
         # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46762
-        common_flags = ["-c", "-O2", "-Wall",
+        common_flags = ["-c", "-O2", "-Wall", "-Wextra",
+            "-Wno-unused-parameter", "-Wno-missing-field-initializers",
             "-fmessage-length=0", "-fno-exceptions", "-fno-builtin",
             "-ffunction-sections", "-fdata-sections",
             "-MMD", "-fno-delete-null-pointer-checks",