diff --git a/lib/digital_signal/digital_signal.c b/lib/digital_signal/digital_signal.c
index 12b543273..ae87a09e4 100644
--- a/lib/digital_signal/digital_signal.c
+++ b/lib/digital_signal/digital_signal.c
@@ -71,6 +71,10 @@ DigitalSignal* digital_signal_alloc(uint32_t max_edges_cnt) {
 void digital_signal_free(DigitalSignal* signal) {
     furi_assert(signal);
 
+    if(!signal) {
+        return;
+    }
+
     free(signal->edge_timings);
     free(signal->reload_reg_buff);
     free(signal->internals);
@@ -298,6 +302,10 @@ DigitalSequence* digital_sequence_alloc(uint32_t size, const GpioPin* gpio) {
 void digital_sequence_free(DigitalSequence* sequence) {
     furi_assert(sequence);
 
+    if(!sequence) {
+        return;
+    }
+
     free(sequence->signals);
     free(sequence->sequence);
     free(sequence);
diff --git a/lib/pulse_reader/pulse_reader.c b/lib/pulse_reader/pulse_reader.c
index 84ce2ff23..c8d0e3ff7 100644
--- a/lib/pulse_reader/pulse_reader.c
+++ b/lib/pulse_reader/pulse_reader.c
@@ -117,6 +117,12 @@ void pulse_reader_set_pull(PulseReader* signal, GpioPull pull) {
 }
 
 void pulse_reader_free(PulseReader* signal) {
+    furi_assert(signal);
+
+    if(!signal) {
+        return;
+    }
+
     free(signal->timer_buffer);
     free(signal->gpio_buffer);
     free(signal);