diff --git a/drivers/entropy/fake_entropy_native_posix.c b/drivers/entropy/fake_entropy_native_posix.c
index 1b7e457fca6..04f25b2e62d 100644
--- a/drivers/entropy/fake_entropy_native_posix.c
+++ b/drivers/entropy/fake_entropy_native_posix.c
@@ -42,7 +42,10 @@ static int entropy_native_posix_get_entropy(const struct device *dev,
 		 */
 		long value = nsi_host_random();
 
-		size_t to_copy = MIN(length, sizeof(long int));
+		/* The host random() provides a number between 0 and 2**31-1. Bit 32 is always 0.
+		 * So let's just use the lower 3 bytes discarding the upper 7 bits
+		 */
+		size_t to_copy = MIN(length, 3);
 
 		memcpy(buffer, &value, to_copy);
 		buffer += to_copy;