diff --git a/common/train.cpp b/common/train.cpp
index 5edd5876e..991679292 100644
--- a/common/train.cpp
+++ b/common/train.cpp
@@ -161,7 +161,7 @@ struct ggml_tensor * randomize_tensor_uniform(struct ggml_tensor * tensor, struc
 }
 
 float frand() {
-    return (float)rand()/(float)RAND_MAX;
+    return (float)rand()/((float)(RAND_MAX) + 1.0f);
 }
 
 float frand_normal(struct random_normal_distribution * rnd) {
diff --git a/common/train.h b/common/train.h
index 97f08964d..4857ba922 100644
--- a/common/train.h
+++ b/common/train.h
@@ -124,6 +124,7 @@ void free_random_uniform_distribution(struct random_uniform_distribution * rnd);
 struct ggml_tensor * randomize_tensor_normal (struct ggml_tensor * tensor, struct random_normal_distribution * rnd);
 struct ggml_tensor * randomize_tensor_uniform(struct ggml_tensor * tensor, struct random_uniform_distribution * rnd);
 
+// generate random float in interval [0,1)
 float frand();
 float frand_normal (struct random_normal_distribution * rnd);
 float frand_uniform(struct random_uniform_distribution * rnd);