diff --git a/.vscode/settings.json b/.vscode/settings.json
index 09044ed..3b8e436 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -19,7 +19,8 @@
         "stdint.h": "c",
         "asoundlib.h": "c",
         "hilbert.h": "c",
-        "fm_modulator.h": "c"
+        "fm_modulator.h": "c",
+        "bs412.h": "c"
     },
     "C_Cpp.errorSquiggles": "disabled"
 }
\ No newline at end of file
diff --git a/lib/bs412.c b/lib/bs412.c
index fdb1fbd..3111745 100644
--- a/lib/bs412.c
+++ b/lib/bs412.c
@@ -18,6 +18,6 @@ float measure_mpx(MPXPowerMeasurement* mpx, int deviation) {
 
 		return modulation_power;
 	} else {
-		return NAN;
+		return -9999.0f;
 	}
 }
\ No newline at end of file
diff --git a/src/fm95.c b/src/fm95.c
index f178bdf..9ed3f00 100644
--- a/src/fm95.c
+++ b/src/fm95.c
@@ -517,7 +517,7 @@ int main(int argc, char **argv) {
 			if(sca_on) output[i] += modulate_fm(&sca_mod, hard_clip(current_sca_in, sca_clipper_threshold))*SCA_VOLUME;
 			
 			float mpower = measure_mpx(&power, output[i]*75000);
-			if(mpower != NAN) {
+			if(mpower != 9999.0f) {
 				printf("MPX Power (%f)\n", mpower);
 			}