diff --git a/proto/anki/stats.proto b/proto/anki/stats.proto
index c08e4407d..3f6814954 100644
--- a/proto/anki/stats.proto
+++ b/proto/anki/stats.proto
@@ -154,6 +154,7 @@ message GraphsResponse {
   ReviewCountsAndTimes reviews = 9;
   uint32 rollover_hour = 10;
   Retrievability retrievability = 12;
+  bool fsrs = 13;
 }
 
 message GraphPreferences {
diff --git a/rslib/src/stats/graphs/mod.rs b/rslib/src/stats/graphs/mod.rs
index ec8f2ae20..7c48666ec 100644
--- a/rslib/src/stats/graphs/mod.rs
+++ b/rslib/src/stats/graphs/mod.rs
@@ -75,6 +75,7 @@ impl Collection {
             card_counts: Some(ctx.card_counts()),
             rollover_hour: self.rollover_for_current_scheduler()? as u32,
             retrievability: Some(ctx.retrievability()),
+            fsrs: self.get_config_bool(BoolKey::Fsrs),
         };
         Ok(resp)
     }
diff --git a/ts/graphs/DifficultyGraph.svelte b/ts/graphs/DifficultyGraph.svelte
index 6460ccf33..cf90f978a 100644
--- a/ts/graphs/DifficultyGraph.svelte
+++ b/ts/graphs/DifficultyGraph.svelte
@@ -35,7 +35,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     const subtitle = tr.statisticsCardDifficultySubtitle();
 </script>
 
-{#if histogramData}
+{#if sourceData?.fsrs}
     <Graph {title} {subtitle}>
         <HistogramGraph data={histogramData} />
 
diff --git a/ts/graphs/EaseGraph.svelte b/ts/graphs/EaseGraph.svelte
index 632fc82c8..6f9c7db37 100644
--- a/ts/graphs/EaseGraph.svelte
+++ b/ts/graphs/EaseGraph.svelte
@@ -35,7 +35,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     const subtitle = tr.statisticsCardEaseSubtitle();
 </script>
 
-{#if histogramData}
+{#if !(sourceData?.fsrs ?? false)}
     <Graph {title} {subtitle}>
         <HistogramGraph data={histogramData} />
 
diff --git a/ts/graphs/RetrievabilityGraph.svelte b/ts/graphs/RetrievabilityGraph.svelte
index 129b244c7..b3a485fea 100644
--- a/ts/graphs/RetrievabilityGraph.svelte
+++ b/ts/graphs/RetrievabilityGraph.svelte
@@ -35,7 +35,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     const subtitle = tr.statisticsRetrievabilitySubtitle();
 </script>
 
-{#if histogramData}
+{#if sourceData?.fsrs}
     <Graph {title} {subtitle}>
         <HistogramGraph data={histogramData} />