diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index a84a1a952b2..fe7813b6d1d 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,8 @@
+1998-08-12  Mark Mitchell  <mark@markmitchell.com>
+
+	* decl.c (grokdeclarator): Issue errors on namespace qualified
+	declarators in parameter lists or in class scope.
+
 1998-08-09  Mark Mitchell  <mark@markmitchell.com>
 
 	* pt.c (check_explicit_specialization): Don't abort on bogus
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 1b70a1ba915..1fa4abf70d2 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -10125,7 +10125,7 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 
     if (decl_context == PARM)
       {
-	if (ctype)
+	if (ctype || in_namespace)
 	  error ("cannot use `::' in parameter declaration");
 
 	/* A parameter declared as an array of T is really a pointer to T.
@@ -10179,6 +10179,12 @@ grokdeclarator (declarator, declspecs, decl_context, initialized, attrlist)
 	       are error_mark_node, for example.  */
 	    decl = NULL_TREE;
 	  }
+	else if (in_namespace)
+	  {
+	    /* Something like struct S { int N::j; };  */
+	    cp_error ("invalid use of `::'");
+	    decl = NULL_TREE;
+	  }
 	else if (TREE_CODE (type) == FUNCTION_TYPE)
 	  {
 	    int publicp = 0;
diff --git a/gcc/testsuite/g++.old-deja/g++.ns/bogus1.C b/gcc/testsuite/g++.old-deja/g++.ns/bogus1.C
new file mode 100644
index 00000000000..c61dea8e77e
--- /dev/null
+++ b/gcc/testsuite/g++.old-deja/g++.ns/bogus1.C
@@ -0,0 +1,10 @@
+// Build don't link:
+
+namespace N {}
+
+void f(int N::k); // ERROR - cannot use `::' in parameter declaration
+
+class Foo
+{
+  int N::j; // ERROR - invalid use of `::'
+};