diff --git a/src/test/csrc/ram.cpp b/src/test/csrc/ram.cpp
index ad51db43d007bd4611846d546234890dad1bb29f..aa72b5052d5d7731ab8d587d74bef354b2f60b4a 100644
--- a/src/test/csrc/ram.cpp
+++ b/src/test/csrc/ram.cpp
@@ -110,6 +110,9 @@ void init_ram(const char *img) {
 
   fseek(fp, 0, SEEK_END);
   img_size = ftell(fp);
+  if (img_size > RAMSIZE) {
+    img_size = RAMSIZE;
+  }
 
   fseek(fp, 0, SEEK_SET);
   int ret = fread(ram, img_size, 1, fp);