diff --git a/src/base64.c b/src/base64.c
index 372dc65f..0b3fc8be 100644
--- a/src/base64.c
+++ b/src/base64.c
@@ -234,29 +234,32 @@ static int get_equals(char *string) {
 }
 
 /* thanks sysk for debugging my mess :) */
+static void _bin_to_base64(unsigned char *dest,
+                           const unsigned char source[3],
+                           int len)
+{
 #define BITS(n) ((1 << (n)) - 1)
-static void _bin_to_base64(unsigned char *dest, const unsigned char source[3],
-    int len) {
-  switch (len) {
-    case 1:
-      dest[0] = alphabet[(source[0] >> 2)];
-      dest[1] = alphabet[((source[0] & BITS(2)) << 4)];
-      dest[2] = '=';
-      dest[3] = '=';
-      break;
-    case 2:
-      dest[0] = alphabet[source[0] >> 2];
-      dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
-      dest[2] = alphabet[(source[1] & BITS(4)) << 2];
-      dest[3] = '=';
-      break;
-    case 3:
-      dest[0] = alphabet[(source[0] >> 2)];
-      dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
-      dest[2] = alphabet[ (source[2] >> 6) | (source[1] & BITS(4)) << 2];
-      dest[3] = alphabet[source[2] & BITS(6)];
-      break;
-  }
+    switch (len) {
+        case 1:
+            dest[0] = alphabet[(source[0] >> 2)];
+            dest[1] = alphabet[((source[0] & BITS(2)) << 4)];
+            dest[2] = '=';
+            dest[3] = '=';
+            break;
+        case 2:
+            dest[0] = alphabet[source[0] >> 2];
+            dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
+            dest[2] = alphabet[(source[1] & BITS(4)) << 2];
+            dest[3] = '=';
+            break;
+        case 3:
+            dest[0] = alphabet[(source[0] >> 2)];
+            dest[1] = alphabet[(source[1] >> 4) | ((source[0] & BITS(2)) << 4)];
+            dest[2] = alphabet[(source[2] >> 6) | (source[1] & BITS(4)) << 2];
+            dest[3] = alphabet[source[2] & BITS(6)];
+            break;
+    }
+#undef BITS
 }
 
 /**