diff --git a/tracetools_analysis/tracetools_analysis/processor/memory_usage.py b/tracetools_analysis/tracetools_analysis/processor/memory_usage.py
index 2891839..4d2b1ee 100644
--- a/tracetools_analysis/tracetools_analysis/processor/memory_usage.py
+++ b/tracetools_analysis/tracetools_analysis/processor/memory_usage.py
@@ -101,11 +101,7 @@ class UserspaceMemoryUsageHandler(MemoryUsageHandler):
     def required_events() -> List[str]:
         return [
             'lttng_ust_libc:malloc',
-            'lttng_ust_libc:calloc',
-            'lttng_ust_libc:realloc',
             'lttng_ust_libc:free',
-            'lttng_ust_libc:memalign',
-            'lttng_ust_libc:posix_memalign',
         ]
 
     def _handle_malloc(