diff --git a/interface_gui.c b/interface_gui.c
index cef5445..09e5faa 100644
--- a/interface_gui.c
+++ b/interface_gui.c
@@ -432,6 +432,7 @@ int getInfodataLength(void)
         return max_x;
     else
         return STDBUFFERLENGTH;
+    (void)max_y; // remove unused var warning
   }
 
 
@@ -1337,6 +1338,7 @@ int guiDialogHandleKeys(EObjectType cdktype, void* object, void* clientdata,
     while (!done);
 
     return 1;
+    (void) selection; // unused
   }
 
 
diff --git a/memory.c b/memory.c
index 5ae7960..b21c361 100644
--- a/memory.c
+++ b/memory.c
@@ -44,7 +44,7 @@ long int                memorycounter = 0;
  */
 void* memDebugAlloc(const char* file, int line, size_t size)
   {
-    fprintf(stderr, "alloc  %5d (%s, line %d)\n", size, file, line);
+    fprintf(stderr, "alloc  %5lu (%s, line %d)\n", size, file, line);
     return memRealAlloc(size);
   }
 
@@ -59,7 +59,7 @@ void* memDebugAlloc(const char* file, int line, size_t size)
  */
 void memDebugFree(const char* file, int line, void* ptr, size_t size)
   {
-    fprintf(stderr, "free   %5d (%s, line %d)\n", size, file, line);
+    fprintf(stderr, "free   %5lu (%s, line %d)\n", size, file, line);
     memRealFree(ptr, size);
   }
 
@@ -76,7 +76,7 @@ void memDebugFreeString(const char* file, int line, void* ptr)
   {
     if (ptr)
       {
-        fprintf(stderr, "free   %5d (%s, line %d)\n",
+        fprintf(stderr, "free   %5zd (%s, line %d)\n",
             strlen(ptr) + 1, file, line);
       }
 
@@ -118,7 +118,7 @@ void* memRealAlloc(size_t size)
     ptr = malloc(size);
     if (!ptr)
       {
-        fprintf(stderr, _("out of memory error - tried to allocate %d byte.\n"),
+        fprintf(stderr, _("out of memory error - tried to allocate %lu byte.\n"),
             size);
         exit(1);
       }
@@ -200,7 +200,7 @@ void* memRealRealloc(void* ptr, size_t size_old, size_t size_new)
     if (!ptr)
       {
         fprintf(stderr,
-            _("out of memory error - tried to reallocate %d byte.\n"),
+            _("out of memory error - tried to reallocate %lu byte.\n"),
             size_new);
         exit(1);
       }