diff --git a/ggml/src/ggml-backend-impl.h b/ggml/src/ggml-backend-impl.h
index e22ddbb02..8d670b894 100644
--- a/ggml/src/ggml-backend-impl.h
+++ b/ggml/src/ggml-backend-impl.h
@@ -211,18 +211,18 @@ extern "C" {
     // Add backend dynamic loading support to the backend
     #ifdef GGML_BACKEND_DL
         #ifdef __cplusplus
-        #    define GGML_BACKEND_DL_IMPL(reg_fn)                             \
-                extern "C" {                                                 \
-                    GGML_BACKEND_API ggml_backend_reg_t ggml_backend_init(); \
-                }                                                            \
-                ggml_backend_reg_t ggml_backend_init() {                     \
-                    return reg_fn();                                         \
+        #    define GGML_BACKEND_DL_IMPL(reg_fn)                                 \
+                extern "C" {                                                     \
+                    GGML_BACKEND_API ggml_backend_reg_t ggml_backend_init(void); \
+                }                                                                \
+                ggml_backend_reg_t ggml_backend_init(void) {                     \
+                    return reg_fn();                                             \
                 }
         #else
-        #    define GGML_BACKEND_DL_IMPL(reg_fn)                          \
-                GGML_BACKEND_API ggml_backend_reg_t ggml_backend_init();  \
-                ggml_backend_reg_t ggml_backend_init() {                  \
-                    return reg_fn();                                      \
+        #    define GGML_BACKEND_DL_IMPL(reg_fn)                             \
+                GGML_BACKEND_API ggml_backend_reg_t ggml_backend_init(void); \
+                ggml_backend_reg_t ggml_backend_init(void) {                 \
+                    return reg_fn();                                         \
                 }
         #endif
     #else