diff --git a/include/sundials/sundials_errors.h b/include/sundials/sundials_errors.h
index 3f6b786114..ae491a9577 100644
--- a/include/sundials/sundials_errors.h
+++ b/include/sundials/sundials_errors.h
@@ -37,6 +37,7 @@
                                                                                \
   ENTRY(SUN_ERR_CORRUPT, "Object is NULL or corrupt")                          \
   ENTRY(SUN_ERR_FILE_OPEN, "Unable to open file")                              \
+  ENTRY(SUN_ERR_MEM_FAIL, "a memory operation failed")                         \
   ENTRY(SUN_ERR_MALLOC_FAIL, "malloc returned NULL")                           \
   ENTRY(SUN_ERR_DESTROY_FAIL, "a destroy function returned an error")          \
   ENTRY(SUN_ERR_NOT_IMPLEMENTED,                                               \