diff --git a/dlls/infosoft/tests/infosoft.c b/dlls/infosoft/tests/infosoft.c
index efebedc0ff..1e2792f19a 100644
--- a/dlls/infosoft/tests/infosoft.c
+++ b/dlls/infosoft/tests/infosoft.c
@@ -32,7 +32,7 @@
 DEFINE_GUID(CLSID_wb_neutral,  0x369647e0,0x17b0,0x11ce,0x99,0x50,0x00,0xaa,0x00,0x4b,0xbb,0x1f);
 DEFINE_GUID(_IID_IWordBreaker, 0xD53552C8,0x77E3,0x101A,0xB5,0x52,0x08,0x00,0x2B,0x33,0xB0,0xE6);
 
-static WCHAR teststring[] = {
+static const WCHAR teststring[] = {
     's','q','u','a','r','e',' ',
     'c','i','r','c','l','e',' ',
     't','r','i','a','n','g','l','e',' ',