diff --git a/spack/package.py b/spack/package.py
index 446a583..9811eb0 100644
--- a/spack/package.py
+++ b/spack/package.py
@@ -170,13 +170,14 @@ def url_for_version(self, version):
     depends_on("libpng", when="@3.2: +png")
     depends_on("openjpeg", when="@3.2: +openjpeg")
 
-    @when("@:2 ^gmake@:4.1")
-
-    def patch(self):
-        filter_file("\\\#define", "#define", "makefile")
-
     # Use Spack compiler wrapper flags
     def inject_flags(self, name, flags):
+
+        @when("@:2 ^gmake@:4.1")
+
+        def patch(self):
+            filter_file("\\\#define", "#define", "makefile")
+            
         if name == "cflags":
             if self.spec.compiler.name == "apple-clang":
                 flags.append("-Wno-error=implicit-function-declaration")