diff --git a/software/firmware/pru0-shepherd-fw/main.c b/software/firmware/pru0-shepherd-fw/main.c
index ca5333c6..e93d9b2d 100644
--- a/software/firmware/pru0-shepherd-fw/main.c
+++ b/software/firmware/pru0-shepherd-fw/main.c
@@ -91,7 +91,7 @@ static uint32_t handle_buffer_swap(volatile struct SharedMem *const shared_mem,
 }
 
 #ifdef ENABLE_DEBUG_MATH_FN
-uint64_t        debug_math_fns(const uint32_t factor, const uint32_t mode)
+uint64_t debug_math_fns(const uint32_t factor, const uint32_t mode)
 {
     uint64_t       result = 0;
     const uint64_t f2     = (uint64_t) factor + ((uint64_t) (factor) << 32u);
diff --git a/software/firmware/pru0-shepherd-fw/sampling.c b/software/firmware/pru0-shepherd-fw/sampling.c
index e557837f..b45a8ad5 100644
--- a/software/firmware/pru0-shepherd-fw/sampling.c
+++ b/software/firmware/pru0-shepherd-fw/sampling.c
@@ -98,9 +98,13 @@ static inline void sample_hrv_ADCs(struct SampleBuffer *const buffer, const uint
     buffer->values_voltage[sample_idx] = adc_fastread(SPI_CS_HRV_V_ADC_PIN);
 }
 
-
+#ifdef EMU_SUPPORT
 void sample(volatile struct SharedMem *const shared_mem,
             struct SampleBuffer *const current_buffer_far, const enum ShepherdMode mode)
+#else
+void sample(volatile const struct SharedMem *const shared_mem,
+            struct SampleBuffer *const current_buffer_far, const enum ShepherdMode mode)
+#endif
 {
     switch (mode) // reordered to prioritize longer routines
     {