diff --git a/SRC/memory.c b/SRC/memory.c
index 6d3ca8d3..9fe37e41 100644
--- a/SRC/memory.c
+++ b/SRC/memory.c
@@ -26,7 +26,7 @@ at the top-level directory.
 
 
 #if ( DEBUGlevel>=1 )           /* Debug malloc/free. */
-int_t superlu_malloc_total = 0;
+int64_t superlu_malloc_total = 0;
 
 #define PAD_FACTOR  2
 #define DWORD  (sizeof(double)) /* Be sure it's no smaller than double. */
diff --git a/SRC/slu_util.h b/SRC/slu_util.h
index e1b0895e..efcb7432 100644
--- a/SRC/slu_util.h
+++ b/SRC/slu_util.h
@@ -24,6 +24,7 @@ at the top-level directory.
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <inttypes.h>
 
 /*
 #ifndef __STDC__
@@ -86,8 +87,8 @@ at the top-level directory.
 #define SUPERLU_FREE(addr) USER_FREE(addr)
 
 #define CHECK_MALLOC(where) {                 \
-    extern int superlu_malloc_total;        \
-    printf("%s: malloc_total %d Bytes\n",     \
+    extern int64_t superlu_malloc_total;        \
+    printf("%s: malloc_total %lld Bytes\n",     \
 	   where, superlu_malloc_total); \
 }