Index: compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_format.inc
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_format.inc
+++ compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_format.inc
@@ -407,7 +407,7 @@
     p = maybe_parse_param_index(p, &dir->precisionIdx);
     CHECK(p);
     // Flags
-    while (char_is_one_of(*p, "'-+ #0")) {
+    while (char_is_one_of(*p, "'-+ #0I")) {
       ++p;
     }
     // Field width