diff --git a/ggml/src/ggml-vulkan/vulkan-shaders/vulkan-shaders-gen.cpp b/ggml/src/ggml-vulkan/vulkan-shaders/vulkan-shaders-gen.cpp
index 809c0bd9b..b1457583a 100644
--- a/ggml/src/ggml-vulkan/vulkan-shaders/vulkan-shaders-gen.cpp
+++ b/ggml/src/ggml-vulkan/vulkan-shaders/vulkan-shaders-gen.cpp
@@ -765,8 +765,8 @@ void write_output_files() {
                 len += "};\n";
             }
         }
-        fprintf(src, data.c_str());
-        fprintf(src, len.c_str());
+        fputs(data.c_str(), src);
+        fputs(len.c_str(), src);
     }
     fclose(hdr);
     fclose(src);