diff --git a/memcheck/tests/leak_cpp_interior.cpp b/memcheck/tests/leak_cpp_interior.cpp
index 497fa8700..f66fc8946 100644
--- a/memcheck/tests/leak_cpp_interior.cpp
+++ b/memcheck/tests/leak_cpp_interior.cpp
@@ -1,3 +1,4 @@
+#define __STDC_FORMAT_MACROS
 #include <inttypes.h>
 #include <stdio.h>
 #include <unistd.h>
diff --git a/memcheck/tests/leak_cpp_interior.stderr.exp b/memcheck/tests/leak_cpp_interior.stderr.exp
index 2ab278734..3228f7483 100644
--- a/memcheck/tests/leak_cpp_interior.stderr.exp
+++ b/memcheck/tests/leak_cpp_interior.stderr.exp
@@ -2,8 +2,8 @@
 valgrind output will go to log
 VALGRIND_DO_LEAK_CHECK
 4 bytes in 1 blocks are definitely lost in loss record ... of ...
-   by 0x........: doit() (leak_cpp_interior.cpp:114)
-   by 0x........: main (leak_cpp_interior.cpp:129)
+   by 0x........: doit() (leak_cpp_interior.cpp:115)
+   by 0x........: main (leak_cpp_interior.cpp:130)
 
 LEAK SUMMARY:
    definitely lost: 4 bytes in 1 blocks
diff --git a/memcheck/tests/leak_cpp_interior.stderr.exp-64bit b/memcheck/tests/leak_cpp_interior.stderr.exp-64bit
index 8bc77a4cf..7a862a3cc 100644
--- a/memcheck/tests/leak_cpp_interior.stderr.exp-64bit
+++ b/memcheck/tests/leak_cpp_interior.stderr.exp-64bit
@@ -2,8 +2,8 @@
 valgrind output will go to log
 VALGRIND_DO_LEAK_CHECK
 8 bytes in 1 blocks are definitely lost in loss record ... of ...
-   by 0x........: doit() (leak_cpp_interior.cpp:114)
-   by 0x........: main (leak_cpp_interior.cpp:129)
+   by 0x........: doit() (leak_cpp_interior.cpp:115)
+   by 0x........: main (leak_cpp_interior.cpp:130)
 
 LEAK SUMMARY:
    definitely lost: 8 bytes in 1 blocks