diff --git a/damus-c/hex.c b/damus-c/hex.c
index 4f07c8e4..4ee54397 100644
--- a/damus-c/hex.c
+++ b/damus-c/hex.c
@@ -39,15 +39,6 @@ bool hex_decode(const char *str, size_t slen, void *buf, size_t bufsize)
     return slen == 0 && bufsize == 0;
 }
 
-static char hexchar(unsigned int val)
-{
-    if (val < 10)
-        return '0' + val;
-    if (val < 16)
-        return 'a' + val - 10;
-    abort();
-}
-
 bool hex_encode(const void *buf, size_t bufsize, char *dest, size_t destsize)
 {
     size_t i;
diff --git a/damus-c/hex.h b/damus-c/hex.h
index 117f6a3a..75f0ad49 100644
--- a/damus-c/hex.h
+++ b/damus-c/hex.h
@@ -70,4 +70,15 @@ static inline size_t hex_data_size(size_t strlen)
 {
     return strlen / 2;
 }
+
+static inline char hexchar(unsigned int val)
+{
+    if (val < 10)
+        return '0' + val;
+    if (val < 16)
+        return 'a' + val - 10;
+    abort();
+}
+
+
 #endif /* CCAN_HEX_H */