1 files changed, 2 insertions, 2 deletions
diff --git a/src/env.c b/src/env.c
index 9d3b3ca4..1becaa12 100644
--- a/src/env.c
+++ b/src/env.c
@@ -103,9 +103,9 @@ serd_env_qualify(const SerdEnv   env,
 		if (uri->n_bytes >= prefix_uri->n_bytes) {
 			if (!strncmp((const char*)uri->buf,
 			             (const char*)prefix_uri->buf,
-			             prefix_uri->n_bytes)) {
+			             prefix_uri->n_bytes - 1)) {
 				*prefix_name = env->prefixes[i].name;
-				suffix->buf = uri->buf + prefix_uri->n_bytes;
+				suffix->buf = uri->buf + prefix_uri->n_bytes - 1;
 				suffix->len = uri->n_bytes - prefix_uri->n_bytes;
 				return true;
 			}