diff --git a/crates/milli/src/update/new/indexer/mod.rs b/crates/milli/src/update/new/indexer/mod.rs
index 383823de1..9ee7577a5 100644
--- a/crates/milli/src/update/new/indexer/mod.rs
+++ b/crates/milli/src/update/new/indexer/mod.rs
@@ -88,7 +88,9 @@ where
             // 2% of the indexing memory
             let total_bbbuffer_capacity = (max_memory / 100 / 2).max(minimum_capacity);
             let new_grenad_parameters = GrenadParameters {
-                max_memory: Some(max_memory.saturating_sub(total_bbbuffer_capacity)),
+                max_memory: Some(
+                    max_memory.saturating_sub(total_bbbuffer_capacity).max(100 * 1024 * 1024),
+                ),
                 ..grenad_parameters
             };
             (new_grenad_parameters, total_bbbuffer_capacity)