diff --git a/4ed_mem.cpp b/4ed_mem.cpp
index 72260d88..6be08ccb 100644
--- a/4ed_mem.cpp
+++ b/4ed_mem.cpp
@@ -77,7 +77,7 @@ general_memory_check(General_Memory *general){
         
         Bubble *next = bubble->next;
         Assert(bubble == next->prev);
-        if (next != sentinel){
+        if (next != sentinel && bubble->prev != sentinel){
             Assert(bubble->next > bubble);
             Assert(bubble > bubble->prev);
             
diff --git a/linux_4ed.cpp b/linux_4ed.cpp
index 2045e85d..1b2cf801 100644
--- a/linux_4ed.cpp
+++ b/linux_4ed.cpp
@@ -2214,7 +2214,7 @@ main(int argc, char **argv)
     memory_vars.user_memory_size = Mbytes(2);
     memory_vars.user_memory = mmap(0, memory_vars.user_memory_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 #endif
-
+    
     String current_directory;
     i32 curdir_req, curdir_size;
     char *curdir_mem;