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-rw-r--r--src/SPI.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/SPI.cpp b/src/SPI.cpp
index 6224338..e550abd 100644
--- a/src/SPI.cpp
+++ b/src/SPI.cpp
@@ -129,7 +129,7 @@ void Reset()
fclose(f);
// take a backup
- char* firmbkp = "firmware.bin.bak";
+ const char* firmbkp = "firmware.bin.bak";
f = fopen(firmbkp, "rb");
if (f) fclose(f);
else