diff --git a/share/qtcreator/gdbmacros/dumper.py b/share/qtcreator/gdbmacros/dumper.py
index 4d7ef4553a8..b60b5df341b 100644
--- a/share/qtcreator/gdbmacros/dumper.py
+++ b/share/qtcreator/gdbmacros/dumper.py
@@ -693,7 +693,8 @@ def makeValue(type, init):
     type = stripClassTag(type)
     if type.find(":") >= 0:
         type = "'" + type + "'"
-    gdb.execute("set $d = (%s*)malloc(sizeof(%s))" % (type, type))
+    # Avoid malloc symbol clash with QVector
+    gdb.execute("set $d = (%s*)calloc(sizeof(%s), 1)" % (type, type))
     gdb.execute("set *$d = {%s}" % init)
     value = parseAndEvaluate("$d").dereference()
     #warn("  TYPE: %s" % value.type)
diff --git a/share/qtcreator/gdbmacros/gdbmacros.py b/share/qtcreator/gdbmacros/gdbmacros.py
index b3b284e4bdd..e3574f5325a 100644
--- a/share/qtcreator/gdbmacros/gdbmacros.py
+++ b/share/qtcreator/gdbmacros/gdbmacros.py
@@ -723,7 +723,8 @@ def qdump__QObject(d, item):
             if d.isExpandedIName(item.iname + ".properties"):
                 # FIXME: Make this global. Don't leak.
                 variant = "'%sQVariant'" % d.ns
-                gdb.execute("set $d = (%s*)malloc(sizeof(%s))" % (variant, variant))
+                # Avoid malloc symbol clash with QVector
+                gdb.execute("set $d = (%s*)calloc(sizeof(%s), 1)" % (variant, variant))
                 gdb.execute("set $d.d.is_shared = 0")
 
                 with Children(d, [propertyCount, 500]):