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-rw-r--r--Modules/md5.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/Modules/md5.h b/Modules/md5.h
index 2b6d25b..13628df 100644
--- a/Modules/md5.h
+++ b/Modules/md5.h
@@ -37,6 +37,8 @@ typedef unsigned long int UINT4;
typedef unsigned short int UINT4;
#elif INT_MAX == 2147483647
typedef unsigned int UINT4;
+#else
+#error "Can't find a 4-byte integral type"
#endif
/* ========== End global.h; continue md5.h ========== */