diff --git a/src/io/dmlc_simple.cpp b/src/io/dmlc_simple.cpp
index 3fbf34734..0448bd578 100644
--- a/src/io/dmlc_simple.cpp
+++ b/src/io/dmlc_simple.cpp
@@ -153,7 +153,7 @@ class StdFile : public dmlc::Stream {
     return std::fread(ptr, 1, size, fp);
   }
   virtual void Write(const void *ptr, size_t size) {
-    std::fwrite(ptr, size, 1, fp);
+    Check(std::fwrite(ptr, size, 1, fp) == 1, "StdFile::Write: fwrite error!");
   }
   virtual void Seek(size_t pos) {
     std::fseek(fp, static_cast<long>(pos), SEEK_SET);  // NOLINT(*)
diff --git a/src/utils/io.h b/src/utils/io.h
index 5b366e51c..1fd09310e 100644
--- a/src/utils/io.h
+++ b/src/utils/io.h
@@ -33,7 +33,7 @@ class FileStream : public ISeekStream {
     return std::fread(ptr, size, 1, fp);
   }
   virtual void Write(const void *ptr, size_t size) {
-    std::fwrite(ptr, size, 1, fp);
+    Check(std::fwrite(ptr, size, 1, fp) == 1, "FileStream::Write: fwrite error!");
   }
   virtual void Seek(size_t pos) {
     std::fseek(fp, static_cast<long>(pos), SEEK_SET); // NOLINT(*)