diff --git a/benchmarks/benchmarks/XSbench/malloc.h b/benchmarks/benchmarks/XSbench/malloc.h
index c67a1e0..d586119 100644
--- a/benchmarks/benchmarks/XSbench/malloc.h
+++ b/benchmarks/benchmarks/XSbench/malloc.h
@@ -59,10 +59,10 @@ static char *heap_start;
 static char *heap;
 static size_t HEAP_SIZE = 1024 * 1024 * 1024;
 
-void *ptr;
-int MallocCounter;
+static void *ptr;
+static int MallocCounter;
 
-size_t sizeUsed;
+static size_t sizeUsed;
 
 // INITAlloc(void) {