diff --git a/src/blame.h b/src/blame.h
index b50021a24..637e43985 100644
--- a/src/blame.h
+++ b/src/blame.h
@@ -42,11 +42,11 @@ typedef struct git_blame__entry {
 	/* true if the suspect is truly guilty; false while we have not
 	 * checked if the group came from one of its parents.
 	 */
-	char guilty;
+	bool guilty;
 
 	/* true if the entry has been scanned for copies in the current parent
 	 */
-	char scanned;
+	bool scanned;
 
 	/* the line number of the first line of this group in the
 	 * suspect's file; internally all line numbers are 0 based.
diff --git a/src/blame_git.c b/src/blame_git.c
index 4df65139a..2b02443de 100644
--- a/src/blame_git.c
+++ b/src/blame_git.c
@@ -602,7 +602,7 @@ void git_blame__like_git(git_blame *blame, uint32_t opt)
 		/* Take responsibility for the remaining entries */
 		for (ent = blame->ent; ent; ent = ent->next) {
 			if (same_suspect(ent->suspect, suspect)) {
-				ent->guilty = 1;
+				ent->guilty = true;
 				ent->is_boundary = !git_oid_cmp(
 						git_commit_id(suspect->commit),
 						&blame->options.oldest_commit);