diff --git a/movement.c b/movement.c
index 976d811d..dac3c08c 100644
--- a/movement.c
+++ b/movement.c
@@ -588,7 +588,10 @@ bool movement_set_accelerometer_motion_threshold(uint8_t new_threshold) {
 
 float movement_get_temperature(void) {
 #if __EMSCRIPTEN__
-    return 25;
+#include <emscripten.h>
+    return EM_ASM_DOUBLE({
+        return temp_c || 25.0;
+    });
 #endif
     float temperature_c = (float)0xFFFFFFFF;