diff --git a/LibC/stdio.cpp b/LibC/stdio.cpp
index 33175a8e60..97c2cdcf12 100644
--- a/LibC/stdio.cpp
+++ b/LibC/stdio.cpp
@@ -23,6 +23,14 @@ int feof(FILE* stream)
     return stream->eof;
 }
 
+int fflush(FILE* stream)
+{
+    // FIXME: Implement buffered streams, duh.
+    if (!stream)
+        return -EBADF;
+    return 0;
+}
+
 char* fgets(char* buffer, int size, FILE* stream)
 {
     assert(stream);
diff --git a/LibC/stdio.h b/LibC/stdio.h
index c0c9927a6e..c681f6ad18 100644
--- a/LibC/stdio.h
+++ b/LibC/stdio.h
@@ -34,6 +34,7 @@ int fclose(FILE*);
 void rewind(FILE*);
 void clearerr(FILE*);
 int feof(FILE*);
+int fflush(FILE*);
 size_t fread(void* ptr, size_t size, size_t nmemb, FILE*);
 size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE*);
 int fprintf(FILE*, const char* fmt, ...);