diff --git a/Objects/abstract.c b/Objects/abstract.c
index eebeacd..b6d4dda 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -806,7 +806,7 @@
 
   for(i=0; i < l; i++)
     {
-      if(((item=PySequence_GetItem(s,i))) ||
+      if(!(item=PySequence_GetItem(s,i)) ||
 	 PyTuple_SetItem(t,i,item) == -1)
 	{
 	  Py_DECREF(t);
@@ -830,7 +830,7 @@
 
   for(i=0; i < l; i++)
     {
-      if((item=PySequence_GetItem(s,i)) ||
+      if(!(item=PySequence_GetItem(s,i)) ||
 	 PyList_SetItem(t,i,item) == -1)
 	{
 	  Py_DECREF(t);