diff --git a/libr/core/cconfig.c b/libr/core/cconfig.c
index 312e5dceba..9448418f2b 100644
--- a/libr/core/cconfig.c
+++ b/libr/core/cconfig.c
@@ -1711,7 +1711,7 @@ static int cb_scrstrconv(void *user, void *data) {
 		}
 		return false;
 	} else {
-		free (core->print->strconv_mode);
+		free ((char *)core->print->strconv_mode);
 		core->print->strconv_mode = strdup (node->value);
 	}
 	return true;
diff --git a/libr/include/r_print.h b/libr/include/r_print.h
index 7a57fd642d..a1407a0ded 100644
--- a/libr/include/r_print.h
+++ b/libr/include/r_print.h
@@ -88,7 +88,7 @@ typedef struct r_print_t {
 	int lines_cache_sz;
 	int lines_abs;
 	bool esc_bslash;
-	char *strconv_mode;
+	const char *strconv_mode;
 
 	// when true it uses row_offsets
 	bool calc_row_offsets;