diff --git a/src/VecSim/index_factories/tiered_factory.h b/src/VecSim/index_factories/tiered_factory.h
index fbb55d3b3..3cf0d5db5 100644
--- a/src/VecSim/index_factories/tiered_factory.h
+++ b/src/VecSim/index_factories/tiered_factory.h
@@ -13,7 +13,9 @@
 #include "VecSim/memory/vecsim_malloc.h"
 #include "VecSim/vec_sim_index.h"
 #include "VecSim/algorithms/hnsw/hnsw_tiered.h"
+#if HAVE_SVS
 #include "VecSim/algorithms/svs/svs_tiered.h"
+#endif
 #include "VecSim/algorithms/brute_force/brute_force.h"
 #include "VecSim/index_factories/factory_utils.h"
 
diff --git a/src/VecSim/vec_sim.cpp b/src/VecSim/vec_sim.cpp
index 4fed53ab8..9da4eb392 100644
--- a/src/VecSim/vec_sim.cpp
+++ b/src/VecSim/vec_sim.cpp
@@ -15,7 +15,9 @@
 #include "VecSim/vec_sim_index.h"
 #include "VecSim/vec_sim_adhoc_bf_ctx.h"
 #include "VecSim/types/bfloat16.h"
+#if HAVE_SVS
 #include "VecSim/algorithms/svs/svs_utils.h"
+#endif
 #include <cassert>
 #include "memory.h"
 
@@ -41,10 +43,16 @@ extern "C" void VecSim_UpdateThreadPoolSize(size_t new_size) {
     } else {
         VecSimIndex::setWriteMode(VecSim_WriteAsync);
     }
+#if HAVE_SVS
     // Resize the shared SVS pool. Clamped to a minimum of 1. OS threads are spawned
     // lazily on first SVS index creation; once an index exists this resizes the
     // shared pool immediately (cooperating with the deferred-shrink protocol).
     VecSimSVSThreadPool::resize(new_size);
+#else
+    // No SVS, so there is no shared pool to resize; the write mode set above is
+    // all this call has to do.
+    (void)new_size;
+#endif
 }
 
 static VecSimResolveCode _ResolveParams_EFRuntime(VecSimAlgo index_type, VecSimRawParam rparam,
@@ -392,7 +400,13 @@ extern "C" VecSimDebugInfoIterator *VecSimIndex_DebugInfoIterator(VecSimIndex *i
 }
 
 extern "C" size_t VecSim_GetSharedMemory(void) {
+#if HAVE_SVS
     return VecSimSVSThreadPool::getSharedAllocationSize();
+#else
+    // The shared pool is an SVS construct; without it no memory is held outside
+    // the individual indexes, which already report their own.
+    return 0;
+#endif
 }
 
 extern "C" VecSimIndexBasicInfo VecSimIndex_BasicInfo(VecSimIndex *index) {