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-rw-r--r--src/base64.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/base64.cpp b/src/base64.cpp
index 90d4de203..728814b00 100644
--- a/src/base64.cpp
+++ b/src/base64.cpp
@@ -40,7 +40,7 @@ static inline bool is_base64(unsigned char c) {
bool base64_is_valid(std::string const& s)
{
- for(int i=0; i<s.size(); i++)
+ for(size_t i=0; i<s.size(); i++)
if(!is_base64(s[i])) return false;
return true;
}