diff --git a/NEWS b/NEWS
index 5a3fa8bbf0c..79a0f552860 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,8 @@ PHP                                                                        NEWS
   . Fixed bug GH-16371 (Assertion failure in Zend/zend_weakrefs.c:646). (Arnaud)
   . Fixed bug GH-16515 (Incorrect propagation of ZEND_ACC_RETURN_REFERENCE for
     call trampoline). (ilutov)
+  . Fixed bug GH-16509 (Incorrect line number in function redeclaration error).
+    (ilutov)
 
 - Curl:
   . Fixed bug GH-16302 (CurlMultiHandle holds a reference to CurlHandle if
diff --git a/Zend/tests/gh16509.inc b/Zend/tests/gh16509.inc
new file mode 100644
index 00000000000..297699fb671
--- /dev/null
+++ b/Zend/tests/gh16509.inc
@@ -0,0 +1,7 @@
+<?php
+
+function test() {
+
+
+    echo 'foo';
+}
diff --git a/Zend/tests/gh16509.phpt b/Zend/tests/gh16509.phpt
new file mode 100644
index 00000000000..e5db98e2378
--- /dev/null
+++ b/Zend/tests/gh16509.phpt
@@ -0,0 +1,11 @@
+--TEST--
+GH-16509: Incorrect lineno reported for function redeclaration
+--FILE--
+<?php
+
+include __DIR__ . '/gh16509.inc';
+include __DIR__ . '/gh16509.inc';
+
+?>
+--EXPECTF--
+Fatal error: Cannot redeclare test() (previously declared in %sgh16509.inc:3) in %sgh16509.inc on line 3
diff --git a/Zend/zend_compile.c b/Zend/zend_compile.c
index 9f04123d4a0..83adec51a9c 100644
--- a/Zend/zend_compile.c
+++ b/Zend/zend_compile.c
@@ -1202,7 +1202,7 @@ static zend_never_inline ZEND_COLD ZEND_NORETURN void do_bind_function_error(zen
 		zend_error_noreturn(error_level, "Cannot redeclare %s() (previously declared in %s:%d)",
 					op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name),
 					ZSTR_VAL(old_function->op_array.filename),
-					old_function->op_array.opcodes[0].lineno);
+					old_function->op_array.line_start);
 	} else {
 		zend_error_noreturn(error_level, "Cannot redeclare %s()",
 			op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name));
@@ -7684,6 +7684,7 @@ static void zend_compile_func_decl(znode *result, zend_ast *ast, bool toplevel)
 	} else if (toplevel) {
 		/* Only register the function after a successful compile */
 		if (UNEXPECTED(zend_hash_add_ptr(CG(function_table), lcname, op_array) == NULL)) {
+			CG(zend_lineno) = decl->start_lineno;
 			do_bind_function_error(lcname, op_array, true);
 		}
 	}
diff --git a/ext/opcache/zend_accelerator_util_funcs.c b/ext/opcache/zend_accelerator_util_funcs.c
index e021270eff3..73f9cf4da0d 100644
--- a/ext/opcache/zend_accelerator_util_funcs.c
+++ b/ext/opcache/zend_accelerator_util_funcs.c
@@ -175,13 +175,13 @@ failure:
 	function2 = Z_PTR_P(t);
 	CG(in_compilation) = 1;
 	zend_set_compiled_filename(function1->op_array.filename);
-	CG(zend_lineno) = function1->op_array.opcodes[0].lineno;
+	CG(zend_lineno) = function1->op_array.line_start;
 	if (function2->type == ZEND_USER_FUNCTION
 		&& function2->op_array.last > 0) {
 		zend_error(E_ERROR, "Cannot redeclare %s() (previously declared in %s:%d)",
 				   ZSTR_VAL(function1->common.function_name),
 				   ZSTR_VAL(function2->op_array.filename),
-				   (int)function2->op_array.opcodes[0].lineno);
+				   (int)function2->op_array.line_start);
 	} else {
 		zend_error(E_ERROR, "Cannot redeclare %s()", ZSTR_VAL(function1->common.function_name));
 	}