diff --git a/README.md b/README.md
index 77ac1b3..999a637 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,14 @@ This release was tested against MarIuX.
 
 ## Revision History
 
+### Version 3.0p15 - Jan 18 2022
+- fix compilation problems with new gcc version
+- Niclas Hofmann, `niclas@molgen.mpg.de`
+
+### Version 3.0p14 - Jul 20 2021
+- code fixes and optimizations
+- Thomas Kreitler, `kreitler@molgen.mpg.de`
+
 ### Version 3.0p13 - Mar 29 2019
 - fix , as 1k divider for numerical output
 - Niclas Hofmann, `niclas@molgen.mpg.de`
diff --git a/version.h b/version.h
index 4091462..e5cbd05 100644
--- a/version.h
+++ b/version.h
@@ -1 +1 @@
-#define	XDU_VERSION	"3.0p14"
+#define	XDU_VERSION	"3.0p15"
diff --git a/xdu.c b/xdu.c
index 841da30..83163a3 100644
--- a/xdu.c
+++ b/xdu.c
@@ -730,10 +730,10 @@ void printpath(int x, int y)
     np = findnode(&top, x, y);
     if (np == NULL)
         return;
-    asprintf(&path, "%s", np->name);
+    (void) asprintf(&path, "%s", np->name);
     while (np->parent != NULL) {
         tmp_path = path;
-        asprintf(&path, "%s/%s", np->parent->name, path);
+        (void) asprintf(&path, "%s/%s", np->parent->name, path);
         np = np->parent;
         free(tmp_path);
     }
diff --git a/xwin.c b/xwin.c
index 65518e8..0c6e3d1 100644
--- a/xwin.c
+++ b/xwin.c
@@ -210,6 +210,9 @@ static char defaultTranslations[] = "\
     ALL_UNUSED_IMPL(VA_NUM_ARGS(__VA_ARGS__)) \
     (__VA_ARGS__)
 
+/* Assuming that there will never be a file lager than 999 petabytes. */
+#define MAX_NUMBER_LABEL_LENGTH 23
+
 /*
  * action routines
  */
@@ -500,7 +503,7 @@ void xrepaint()
 
 void readable_float(float number, char* number_label)
 {
-    char number_string[1024];
+    char number_string[MAX_NUMBER_LABEL_LENGTH];
     int i, j, length;
     sprintf(number_string, "%.2f", number);
     length = (strlen(number_string) - 4) / 3 + strlen(number_string);
@@ -517,7 +520,7 @@ void readable_float(float number, char* number_label)
 
 void readable_long_long(long long number, char* number_label)
 {
-    char number_string[1024];
+    char number_string[MAX_NUMBER_LABEL_LENGTH];
     int i, j, length;
     sprintf(number_string, "%lld", number);
     length = (strlen(number_string) - 1) / 3 + strlen(number_string);
@@ -537,7 +540,7 @@ void xdrawrect(char* name, long long size, int x, int y, int width, int height)
     int textx,
         texty;
     char label[1024];
-    char number_label[1024];
+    char number_label[MAX_NUMBER_LABEL_LENGTH];
     XCharStruct overall;
     int ascent,
         descent,