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-rw-r--r--engines/m4/resource.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/engines/m4/resource.cpp b/engines/m4/resource.cpp
index eb9a69998c..a7e092f9e2 100644
--- a/engines/m4/resource.cpp
+++ b/engines/m4/resource.cpp
@@ -152,7 +152,9 @@ void FileSystem::changeExtension(char *destName, const char *sourceName, const c
char *dot = strrchr(destName, '.');
if (dot != NULL)
*dot = 0;
- sprintf(destName, "%s.%s", destName, extension);
+
+ strcat(destName, ".");
+ strcat(destName, extension);
str_upper(destName);
}