diff --git a/src/arch/arm/isa/insts/neon64_mem.isa b/src/arch/arm/isa/insts/neon64_mem.isa
index 4d32412266..4511ad1052 100644
--- a/src/arch/arm/isa/insts/neon64_mem.isa
+++ b/src/arch/arm/isa/insts/neon64_mem.isa
@@ -336,7 +336,8 @@ let {{
             eCode = '''
                 //input data from scratch area
                 VReg input[4] = { {0, 0}, {0, 0}, {0, 0}, {0, 0} };
-                VReg output[2];  //output data to arch. SIMD regs
+                //output data to arch. SIMD regs
+                VReg output[2] = { {0, 0}, {0, 0} };
             '''
 
             eCode += getInputCodeOp1L