diff --git a/libdecnumber/ChangeLog b/libdecnumber/ChangeLog
index d4bb98418a1e..f7368a44c347 100644
--- a/libdecnumber/ChangeLog
+++ b/libdecnumber/ChangeLog
@@ -1,3 +1,8 @@
+2005-12-20  Roger Sayle  <roger@eyesopen.com>
+
+	* decNumber.c (decStrEq): Cast operands to int before calling
+	tolower to avoid compilation warnings on Tru64.
+
 2005-12-05  Ben Elliston  <bje@au.ibm.com>
 
 	* Makefile.in (clean): Remove stray reference to libcpp.a.
diff --git a/libdecnumber/decNumber.c b/libdecnumber/decNumber.c
index 28a4ea1c6e48..0625e9f2541b 100644
--- a/libdecnumber/decNumber.c
+++ b/libdecnumber/decNumber.c
@@ -5445,7 +5445,7 @@ decStrEq (const char *str1, const char *str2)
 	}
       else
 	{
-	  if (tolower (*str1) != tolower (*str2))
+	  if (tolower ((int) *str1) != tolower ((int) *str2))
 	    return 0;
 	}
     }				/* stepping */