diff --git a/src/libopensc/reader-pcsc.c b/src/libopensc/reader-pcsc.c
index 6e1b95d1..b6a33c7a 100644
--- a/src/libopensc/reader-pcsc.c
+++ b/src/libopensc/reader-pcsc.c
@@ -923,7 +923,7 @@ static void detect_reader_features(sc_reader_t *reader, SCARDHANDLE card_handle)
 	}
 
 	if (priv->pace_ioctl) {
-		char *log_text = "Reader supports PACE";
+		const char *log_text = "Reader supports PACE";
 		if (priv->gpriv->enable_pace) {
 			reader->capabilities |= part10_detect_pace_capabilities(reader);