diff --git a/ProcessList.c b/ProcessList.c
index fa8ff4a4..4d4a7ca1 100644
--- a/ProcessList.c
+++ b/ProcessList.c
@@ -564,7 +564,7 @@ void ProcessList_rebuildPanel(ProcessList* this) {
 
 Process* ProcessList_getProcess(ProcessList* this, pid_t pid, bool* preExisting, Process_New constructor) {
    Process* proc = (Process*) Hashtable_get(this->processTable, pid);
-   *preExisting = proc;
+   *preExisting = proc != NULL;
    if (proc) {
       assert(Vector_indexOf(this->processes, proc, Process_pidCompare) != -1);
       assert(proc->pid == pid);