diff --git a/ggml/include/ggml.h b/ggml/include/ggml.h
index d6c45c948..e24b8a319 100644
--- a/ggml/include/ggml.h
+++ b/ggml/include/ggml.h
@@ -1980,6 +1980,9 @@ extern "C" {
     typedef void (*ggml_custom2_op_t)(struct ggml_tensor * dst , const struct ggml_tensor * a, const struct ggml_tensor * b, int ith, int nth, void * userdata);
     typedef void (*ggml_custom3_op_t)(struct ggml_tensor * dst , const struct ggml_tensor * a, const struct ggml_tensor * b, const struct ggml_tensor * c, int ith, int nth, void * userdata);
 
+#define GGML_N_TASKS_MAX (-1)
+    // n_tasks == GGML_N_TASKS_MAX means to use max number of tasks
+
     GGML_API struct ggml_tensor * ggml_map_custom1(
             struct ggml_context   * ctx,
             struct ggml_tensor    * a,
diff --git a/ggml/src/ggml.c b/ggml/src/ggml.c
index d4aa0a81b..4b782b0c1 100644
--- a/ggml/src/ggml.c
+++ b/ggml/src/ggml.c
@@ -313,7 +313,6 @@ void ggml_abort(const char * file, int line, const char * fmt, ...) {
 #define GGML_DEBUG 0
 #define GGML_GELU_FP16
 #define GGML_GELU_QUICK_FP16
-#define GGML_N_TASKS_MAX (-1)
 
 #define GGML_SOFT_MAX_UNROLL 4
 #define GGML_VEC_DOT_UNROLL  2