diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f3ce87b236..1eca559137 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -905,6 +905,30 @@ jobs:
         run: |
           bake run test/cpp --cfg sanitize -- -j 8
 
+  test-os-alloc-core:
+    needs: [ build-linux ]
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-20.04 ]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: install bake
+        run: |
+          git clone https://github.com/SanderMertens/bake
+          make -C bake/build-$(uname)
+          bake/bake setup
+
+      - name: build flecs
+        run: bake --cfg sanitize -D FLECS_USE_OS_ALLOC
+
+      - name: run tests
+        run: |
+          bake run test/core --cfg sanitize -- -j 8
+
   test-cmake:
     needs: [ build-linux, build-macos ]
     runs-on: ${{ matrix.os }}
diff --git a/distr/flecs.c b/distr/flecs.c
index 85a0ac9609..0d8acbb65e 100644
--- a/distr/flecs.c
+++ b/distr/flecs.c
@@ -36016,12 +36016,12 @@ void flecs_id_record_free(
         world->id_index_lo[hash] = NULL;
     }
 
-    flecs_bfree(&world->allocators.id_record, idr);
-
 #ifdef FLECS_DEBUG_INFO
     ecs_os_free(idr->str);
 #endif
 
+    flecs_bfree(&world->allocators.id_record, idr);
+
     if (ecs_should_log_1()) {
         char *id_str = ecs_id_str(world, id);
         ecs_dbg_1("#[green]id#[normal] %s #[red]deleted", id_str);
diff --git a/src/storage/id_index.c b/src/storage/id_index.c
index f8e8603967..e7d7a43bd3 100644
--- a/src/storage/id_index.c
+++ b/src/storage/id_index.c
@@ -486,12 +486,12 @@ void flecs_id_record_free(
         world->id_index_lo[hash] = NULL;
     }
 
-    flecs_bfree(&world->allocators.id_record, idr);
-
 #ifdef FLECS_DEBUG_INFO
     ecs_os_free(idr->str);
 #endif
 
+    flecs_bfree(&world->allocators.id_record, idr);
+
     if (ecs_should_log_1()) {
         char *id_str = ecs_id_str(world, id);
         ecs_dbg_1("#[green]id#[normal] %s #[red]deleted", id_str);