diff --git a/panda/src/pstatclient/pStatClient.cxx b/panda/src/pstatclient/pStatClient.cxx
index 0cb89ab855..89206b3645 100644
--- a/panda/src/pstatclient/pStatClient.cxx
+++ b/panda/src/pstatclient/pStatClient.cxx
@@ -557,8 +557,10 @@ is_active(int collector_index, int thread_index) const {
 ////////////////////////////////////////////////////////////////////
 void PStatClient::
 start(int collector_index, int thread_index) {
+#ifdef _DEBUG
   nassertv(collector_index >= 0 && collector_index < (int)_collectors.size());
   nassertv(thread_index >= 0 && thread_index < (int)_threads.size());
+#endif
 
   if (_collectors[collector_index]._def->_is_active &&
       _threads[thread_index]._is_active) {
@@ -581,8 +583,10 @@ start(int collector_index, int thread_index) {
 ////////////////////////////////////////////////////////////////////
 void PStatClient::
 start(int collector_index, int thread_index, float as_of) {
+#ifdef _DEBUG
   nassertv(collector_index >= 0 && collector_index < (int)_collectors.size());
   nassertv(thread_index >= 0 && thread_index < (int)_threads.size());
+#endif
 
   if (_collectors[collector_index]._def->_is_active &&
       _threads[thread_index]._is_active) {
@@ -604,8 +608,10 @@ start(int collector_index, int thread_index, float as_of) {
 ////////////////////////////////////////////////////////////////////
 void PStatClient::
 stop(int collector_index, int thread_index) {
+#ifdef _DEBUG
   nassertv(collector_index >= 0 && collector_index < (int)_collectors.size());
   nassertv(thread_index >= 0 && thread_index < (int)_threads.size());
+#endif
 
   if (_collectors[collector_index]._def->_is_active &&
       _threads[thread_index]._is_active) {
@@ -637,8 +643,10 @@ stop(int collector_index, int thread_index) {
 ////////////////////////////////////////////////////////////////////
 void PStatClient::
 stop(int collector_index, int thread_index, float as_of) {
+#ifdef _DEBUG
   nassertv(collector_index >= 0 && collector_index < (int)_collectors.size());
   nassertv(thread_index >= 0 && thread_index < (int)_threads.size());
+#endif
 
   if (_collectors[collector_index]._def->_is_active &&
       _threads[thread_index]._is_active) {
diff --git a/panda/src/pstatclient/pStatFrameData.I b/panda/src/pstatclient/pStatFrameData.I
index 81789ba821..dfae06e7f1 100644
--- a/panda/src/pstatclient/pStatFrameData.I
+++ b/panda/src/pstatclient/pStatFrameData.I
@@ -70,7 +70,9 @@ clear() {
 ////////////////////////////////////////////////////////////////////
 INLINE void PStatFrameData::
 add_start(int index, float time) {
+#ifdef _DEBUG
   nassertv((index & 0x7fff) == index);
+#endif
   DataPoint dp;
   dp._index = index;
   dp._value = time;
@@ -85,7 +87,9 @@ add_start(int index, float time) {
 ////////////////////////////////////////////////////////////////////
 INLINE void PStatFrameData::
 add_stop(int index, float time) {
+#ifdef _DEBUG
   nassertv((index & 0x7fff) == index);
+#endif
   DataPoint dp;
   dp._index = index | 0x8000;
   dp._value = time;
@@ -100,7 +104,9 @@ add_stop(int index, float time) {
 ////////////////////////////////////////////////////////////////////
 INLINE void PStatFrameData::
 add_level(int index, float level) {
+#ifdef _DEBUG
   nassertv((index & 0xffff) == index);
+#endif
   DataPoint dp;
   dp._index = index;
   dp._value = level;