diff --git a/regression/cbmc/Function_Parameters1/main.c b/regression/cbmc/Function_Parameters1/main.c
index 8f0d7dc515..29770c106d 100644
--- a/regression/cbmc/Function_Parameters1/main.c
+++ b/regression/cbmc/Function_Parameters1/main.c
@@ -1,9 +1,12 @@
+#include <assert.h>
+
 void f(int, int array[*][*]);
 
-void f(int size, int array[size][size])
+inline void f(int size, int array[size][++size])
 {
+  assert(size==1001);
   assert(sizeof(array)==sizeof(int *));
-  assert(sizeof(*array)==sizeof(int)*1000);
+  assert(sizeof(*array)==sizeof(int)*1001);
 }
 
 int main()
diff --git a/regression/cbmc/Function_Parameters1/test.desc b/regression/cbmc/Function_Parameters1/test.desc
index 466da18b2b..fc2b187405 100644
--- a/regression/cbmc/Function_Parameters1/test.desc
+++ b/regression/cbmc/Function_Parameters1/test.desc
@@ -1,4 +1,4 @@
-CORE
+KNOWNBUG
 main.c
 
 ^EXIT=0$