diff --git a/pdf.c b/pdf.c
index f0eac27c4067b2d1ee299fb19f96960f7a934493..b3101781628c5c931c9a0750970592b9f7721710 100644
--- a/pdf.c
+++ b/pdf.c
@@ -1091,7 +1091,7 @@ validate_dict_(HParseResult *p, void *u)
 			kj = H_INDEX_BYTES(seq->elements[j], 0);
 
 			if (bytescmp(ki, kj) == 0) {
-				log_message(7, "duplicate key /%*s in "
+				log_message(7, "duplicate key /%.*s in "
 				    "dictionary\n", (int)ki.len, ki.token);
 				return false;
 			}
@@ -4530,7 +4530,7 @@ act_ks_value(const HParseResult *p, void *u)
 			b = v->bytes;
 		if (b.len > INT_MAX)
 			b.len = INT_MAX;
-		log_message(7, "parse error in stream (type %*s)\n",
+		log_message(7, "parse error in stream (type %.*s)\n",
 		    (int)b.len, b.token);
 	}
 	return H_MAKE(HParseResult, res);