diff --git a/client/cmddata.c b/client/cmddata.c
index 8b263e44d..a9f58b962 100644
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -1645,7 +1645,7 @@ int CmdNorm(const char *Cmd) {
 	// set signal properties low/high/mean/amplitude and isnoice detection
 	uint8_t bits[GraphTraceLen];
 	size_t size = getFromGraphBuf(bits);
-	isNoise(bits, sizeof(bits));
+	isNoise(bits, size);
 	RepaintGraphWindow();
 	return 0;
 }
@@ -1735,7 +1735,7 @@ int CmdDirectionalThreshold(const char *Cmd) {
 	// set signal properties low/high/mean/amplitude and isnoice detection
 	uint8_t bits[GraphTraceLen];
 	size_t size = getFromGraphBuf(bits);
-	isNoise(bits, sizeof(bits));
+	isNoise(bits, size);
 
 	RepaintGraphWindow();
 	return 0;
@@ -1767,7 +1767,7 @@ int CmdZerocrossings(const char *Cmd) {
 	// set signal properties low/high/mean/amplitude and isnoice detection
 	uint8_t bits[GraphTraceLen];
 	size_t size = getFromGraphBuf(bits);
-	isNoise(bits, sizeof(bits));
+	isNoise(bits, size);
 
 	RepaintGraphWindow();
 	return 0;
@@ -2025,7 +2025,7 @@ int CmdDataIIR(const char *Cmd){
 	// set signal properties low/high/mean/amplitude and isnoice detection
 	uint8_t bits[GraphTraceLen];
 	size_t size = getFromGraphBuf(bits);
-	isNoise(bits, sizeof(bits));
+	isNoise(bits, size);
 
 	RepaintGraphWindow();	
 	return 0;