diff --git a/src/zscript/vm.h b/src/zscript/vm.h
index 31136bba2..0d45ad90a 100644
--- a/src/zscript/vm.h
+++ b/src/zscript/vm.h
@@ -162,6 +162,7 @@ enum EVMAbortException
 	X_WRITE_NIL,
 	X_TOO_MANY_TRIES,
 	X_ARRAY_OUT_OF_BOUNDS,
+	X_DIVISION_BY_ZERO,
 };
 
 class VMFunction : public DObject
diff --git a/src/zscript/vmexec.h b/src/zscript/vmexec.h
index 8232340a0..42a374030 100644
--- a/src/zscript/vmexec.h
+++ b/src/zscript/vmexec.h
@@ -786,27 +786,51 @@ begin:
 
 	OP(DIV_RR):
 		ASSERTD(a); ASSERTD(B); ASSERTD(C);
+		if (reg.d[C] == 0)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.d[a] = reg.d[B] / reg.d[C];
 		NEXTOP;
 	OP(DIV_RK):
 		ASSERTD(a); ASSERTD(B); ASSERTKD(C);
+		if (konstd[C] == 0)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.d[a] = reg.d[B] / konstd[C];
 		NEXTOP;
 	OP(DIV_KR):
 		ASSERTD(a); ASSERTKD(B); ASSERTD(C);
+		if (reg.d[C] == 0)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.d[a] = konstd[B] / reg.d[C];
 		NEXTOP;
 
 	OP(MOD_RR):
 		ASSERTD(a); ASSERTD(B); ASSERTD(C);
+		if (reg.d[C] == 0)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.d[a] = reg.d[B] % reg.d[C];
 		NEXTOP;
 	OP(MOD_RK):
 		ASSERTD(a); ASSERTD(B); ASSERTKD(C);
+		if (konstd[C] == 0)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.d[a] = reg.d[B] % konstd[C];
 		NEXTOP;
 	OP(MOD_KR):
 		ASSERTD(a); ASSERTKD(B); ASSERTD(C);
+		if (reg.d[C] == 0)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.d[a] = konstd[B] % reg.d[C];
 		NEXTOP;
 
@@ -981,14 +1005,26 @@ begin:
 
 	OP(DIVF_RR):
 		ASSERTF(a); ASSERTF(B); ASSERTF(C);
+		if (reg.f[C] == 0.)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.f[a] = reg.f[B] / reg.f[C];
 		NEXTOP;
 	OP(DIVF_RK):
 		ASSERTF(a); ASSERTF(B); ASSERTKF(C);
+		if (konstf[C] == 0.)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.f[a] = reg.f[B] / konstf[C];
 		NEXTOP;
 	OP(DIVF_KR):
 		ASSERTF(a); ASSERTKF(B); ASSERTF(C);
+		if (reg.f[C] == 0.)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.f[a] = konstf[B] / reg.f[C];
 		NEXTOP;
 
@@ -996,6 +1032,10 @@ begin:
 		ASSERTF(a); ASSERTF(B); ASSERTF(C);
 		fb = reg.f[B]; fc = reg.f[C];
 	Do_MODF:
+		if (fc == 0.)
+		{
+			THROW(X_DIVISION_BY_ZERO);
+		}
 		reg.f[a] = luai_nummod(fb, fc);
 		NEXTOP;
 	OP(MODF_RK):
diff --git a/src/zscript/vmframe.cpp b/src/zscript/vmframe.cpp
index 9f8ad7dc0..29da0c5b9 100644
--- a/src/zscript/vmframe.cpp
+++ b/src/zscript/vmframe.cpp
@@ -436,6 +436,10 @@ int VMFrameStack::Call(VMFunction *func, VMValue *params, int numparams, VMRetur
 		case X_ARRAY_OUT_OF_BOUNDS:
 			Printf("array access out of bounds.");
 			break;
+
+		case X_DIVISION_BY_ZERO:
+			Printf("division by zero.");
+			break;
 		}
 		Printf("\n");