diff --git a/gcc/objc/ChangeLog b/gcc/objc/ChangeLog
index 42f50c2fa13..7b424391dd0 100644
--- a/gcc/objc/ChangeLog
+++ b/gcc/objc/ChangeLog
@@ -1,3 +1,9 @@
+2011-01-17  Nicola Pero  <nicola.pero@meta-innovation.com>
+
+	PR objc/47314
+	* objc-act.c (finish_objc): When calling check_duplicates to check
+	duplicated instance methods, set 'is_class' to 0, not 1.
+
 2011-01-14  Ben Elliston  <bje@au.ibm.com>
 
 	PR 19162
diff --git a/gcc/objc/objc-act.c b/gcc/objc/objc-act.c
index cfbdb6f6134..33d39b222f4 100644
--- a/gcc/objc/objc-act.c
+++ b/gcc/objc/objc-act.c
@@ -12986,7 +12986,7 @@ finish_objc (void)
 	  for (hsh = cls_method_hash_list[slot]; hsh; hsh = hsh->next)
 	    check_duplicates (hsh, 0, 1);
 	  for (hsh = nst_method_hash_list[slot]; hsh; hsh = hsh->next)
-	    check_duplicates (hsh, 0, 1);
+	    check_duplicates (hsh, 0, 0);
 	}
     }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 2509e229558..ad331343653 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2011-01-17  Nicola Pero  <nicola.pero@meta-innovation.com>
+
+	PR objc/47314
+	* objc.dg/selector-warn-1.m: New.
+	* obj-c++.dg/selector-warn-1.mm: New.
+
 2011-01-17  Richard Sandiford  <rdsandiford@googlemail.com>
 
 	* gcc.dg/tree-ssa/vrp51.c: Prefix each "bug." string with "vrp.".
diff --git a/gcc/testsuite/obj-c++.dg/selector-warn-1.mm b/gcc/testsuite/obj-c++.dg/selector-warn-1.mm
new file mode 100644
index 00000000000..b4b308d7b70
--- /dev/null
+++ b/gcc/testsuite/obj-c++.dg/selector-warn-1.mm
@@ -0,0 +1,16 @@
+/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, January 2011.  */
+/* { dg-options "-Wselector" } */
+/* { dg-do compile } */
+
+#include <objc/objc.h>
+
+@interface RootObject
+@end
+
+@interface MyObject : RootObject
+- (void) method; /* { dg-message "found" } */
+@end
+
+@interface MyObject2  : RootObject
+- (int) method; /* { dg-message "also found" } */
+@end /* { dg-warning "multiple selectors named .-method. found" } */
diff --git a/gcc/testsuite/objc.dg/selector-warn-1.m b/gcc/testsuite/objc.dg/selector-warn-1.m
new file mode 100644
index 00000000000..b4b308d7b70
--- /dev/null
+++ b/gcc/testsuite/objc.dg/selector-warn-1.m
@@ -0,0 +1,16 @@
+/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, January 2011.  */
+/* { dg-options "-Wselector" } */
+/* { dg-do compile } */
+
+#include <objc/objc.h>
+
+@interface RootObject
+@end
+
+@interface MyObject : RootObject
+- (void) method; /* { dg-message "found" } */
+@end
+
+@interface MyObject2  : RootObject
+- (int) method; /* { dg-message "also found" } */
+@end /* { dg-warning "multiple selectors named .-method. found" } */