diff --git a/src/render/Framebuffer.cpp b/src/render/Framebuffer.cpp
index 90b41a4b..a85b0260 100644
--- a/src/render/Framebuffer.cpp
+++ b/src/render/Framebuffer.cpp
@@ -3,6 +3,7 @@
 
 bool CFramebuffer::alloc(int w, int h) {
     bool firstAlloc = false;
+    RASSERT((w > 1 && h > 1), "cannot alloc a FB with negative / zero size! (attempted %ix%i)", w, h);
     
     if (m_iFb == (uint32_t)-1) {
         firstAlloc = true;