--- a/Python/import.c	Wed Jan 25 03:00:57 2012 +0100
+++ b/Python/import.c	Wed Jan 25 18:01:45 2012 +0100
@@ -1226,9 +1226,9 @@
         (void) unlink(cpathname);
         return;
     }
-    /* Now write the true mtime */
+    /* Now write the true mtime (as a 32-bit field) */
     fseek(fp, 4L, 0);
-    assert(mtime < LONG_MAX);
+    assert(mtime <= 0xFFFFFFFF);
     PyMarshal_WriteLongToFile((long)mtime, fp, Py_MARSHAL_VERSION);
     fflush(fp);
     fclose(fp);
@@ -1302,14 +1302,14 @@
                      pathname);
         return NULL;
     }
-#if SIZEOF_TIME_T > 4
-    /* Python's .pyc timestamp handling presumes that the timestamp fits
-       in 4 bytes. Since the code only does an equality comparison,
-       ordering is not important and we can safely ignore the higher bits
-       (collisions are extremely unlikely).
-     */
-    st.st_mtime &= 0xFFFFFFFF;
-#endif
+    if (sizeof st.st_mtime > 4) {
+        /* Python's .pyc timestamp handling presumes that the timestamp fits
+           in 4 bytes. Since the code only does an equality comparison,
+           ordering is not important and we can safely ignore the higher bits
+           (collisions are extremely unlikely).
+         */
+        st.st_mtime &= 0xFFFFFFFF;
+    }
     cpathname = make_compiled_pathname(
         pathname, buf, (size_t)MAXPATHLEN + 1, !Py_OptimizeFlag);
     if (cpathname != NULL &&