diff --git a/firmware/hw_layer/sensors/max3185x.cpp b/firmware/hw_layer/sensors/max3185x.cpp
index 90b4e21cabf..4aea4313005 100644
--- a/firmware/hw_layer/sensors/max3185x.cpp
+++ b/firmware/hw_layer/sensors/max3185x.cpp
@@ -307,7 +307,7 @@ class Max3185xRead final : public ThreadController<UTILITY_THREAD_STACK_SIZE> {
 						(rx[3] <<  0);
 
 		/* MISO is constantly low or high */
-		if ((data = 0xffffffff) || (data == 0x0)) {
+		if ((data == 0xffffffff) || (data == 0x0)) {
 			return UNKNOWN_TYPE;
 		}