diff --git a/tools/export-lora/export-lora.cpp b/tools/export-lora/export-lora.cpp
index 24dc85cf2..f038019b0 100644
--- a/tools/export-lora/export-lora.cpp
+++ b/tools/export-lora/export-lora.cpp
@@ -148,7 +148,7 @@ struct lora_merge_ctx {
 
         ctx_out = gguf_init_empty();
         struct ggml_init_params params = {
-            /*.mem_size   =*/ gguf_get_n_tensors(base_model.ctx_gguf)*ggml_tensor_overhead(),
+            /*.mem_size   =*/ static_cast<size_t>(gguf_get_n_tensors(base_model.ctx_gguf)*ggml_tensor_overhead()),
             /*.mem_buffer =*/ NULL,
             /*.no_alloc   =*/ true,
         };
diff --git a/tools/mtmd/clip.cpp b/tools/mtmd/clip.cpp
index be191404c..e8e3b0a01 100644
--- a/tools/mtmd/clip.cpp
+++ b/tools/mtmd/clip.cpp
@@ -2315,7 +2315,7 @@ struct clip_model_loader {
 
         // create data context
         struct ggml_init_params params = {
-            /*.mem_size =*/ (gguf_get_n_tensors(ctx_gguf.get()) + 1) * ggml_tensor_overhead(),
+            /*.mem_size =*/ static_cast<size_t>(gguf_get_n_tensors(ctx_gguf.get()) + 1) * ggml_tensor_overhead(),
             /*.mem_buffer =*/ NULL,
             /*.no_alloc =*/ true,
         };