diff --git a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
index f1f33cb84..8e32f3b63 100644
--- a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
@@ -15,6 +15,7 @@
 #include "loadPattern.h"
 
 #include <netinet/in.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h> // usleep
 #ifdef VIRTUAL
@@ -2258,8 +2259,9 @@ void *start_timer(void *arg) {
     int packetsPerFrame = ceil((double)imageSize / (double)dataSize);
 
     // Generate Data
-    char imageData[imageSize]; //
+    char *imageData = (char *)malloc(imageSize);
     memset(imageData, 0, imageSize);
+
     /*
     for (int i = 0; i < imageSize; i += sizeof(uint16_t)) {
         *((uint16_t *)(imageData + i)) = i;
@@ -2325,6 +2327,8 @@ void *start_timer(void *arg) {
         setNextFrameNumber(frameNr + numFrames);
     }
 
+    free(imageData);
+
     closeUDPSocket(0);
 
     sharedMemory_setStatus(IDLE);