diff --git a/wled00/FXparticleSystem.cpp b/wled00/FXparticleSystem.cpp
index cd537e8c..d5342f04 100644
--- a/wled00/FXparticleSystem.cpp
+++ b/wled00/FXparticleSystem.cpp
@@ -1103,7 +1103,7 @@ bool allocateParticleSystemMemory2D(uint32_t numparticles, uint32_t numsources,
   if (sizecontrol)
     requiredmemory += sizeof(PSsizeControl) * numparticles;
   requiredmemory += sizeof(PSsource) * numsources;
-  requiredmemory += sizeof(CRGB) * SEGMENT.virtualLength(); // virtualLength is witdh * height
+  requiredmemory += sizeof(CRGB) * uint32_t(SEGMENT.calc_virtualWidth()) * uint32_t(SEGMENT.calc_virtualHeight()); // virtualLength not reliable, better to use vWidth * vHeight
   requiredmemory += additionalbytes + 3; // add 3 to ensure there is room for stuffing bytes
   //requiredmemory = (requiredmemory + 3) & ~0x03; // align memory block to next 4-byte boundary
   PSPRINTLN("mem alloc: " + String(requiredmemory));
@@ -1938,4 +1938,4 @@ static bool checkBoundsAndWrap(int32_t &position, const int32_t max, const int32
   c.b = ((c.b * scale) >> 8);
 }
 
-#endif  // !(defined(WLED_DISABLE_PARTICLESYSTEM2D) && defined(WLED_DISABLE_PARTICLESYSTEM1D))
\ No newline at end of file
+#endif  // !(defined(WLED_DISABLE_PARTICLESYSTEM2D) && defined(WLED_DISABLE_PARTICLESYSTEM1D))