diff --git a/src/arch/arm/isa/insts/neon.isa b/src/arch/arm/isa/insts/neon.isa
index 1dfefe7c30..c8f8fcd849 100644
--- a/src/arch/arm/isa/insts/neon.isa
+++ b/src/arch/arm/isa/insts/neon.isa
@@ -1452,7 +1452,7 @@ let {{
         rCount = 2
         eWalkCode = simdEnabledCheckCode + '''
         RegVect srcReg1, srcReg2;
-        BigRegVect destReg;
+        BigRegVect destReg = {0};
         '''
         for reg in range(rCount):
             eWalkCode += '''
@@ -1654,7 +1654,7 @@ let {{
         global header_output, exec_output
         eWalkCode = simdEnabledCheckCode + '''
         RegVect srcReg1;
-        BigRegVect destReg;
+        BigRegVect destReg = {0};
         '''
         for reg in range(2):
             eWalkCode += '''
@@ -1884,7 +1884,7 @@ let {{
         global header_output, exec_output
         eWalkCode = simdEnabledCheckCode + '''
         RegVect srcRegs;
-        BigRegVect destReg;
+        BigRegVect destReg = {0};
         '''
         for reg in range(rCount):
             eWalkCode += '''
@@ -2010,7 +2010,7 @@ let {{
         global header_output, exec_output
         eWalkCode = simdEnabledCheckCode + '''
         RegVect srcReg1;
-        BigRegVect destReg;
+        BigRegVect destReg = {0};
         '''
         for reg in range(2):
             eWalkCode += '''
diff --git a/src/arch/arm/isa/insts/neon64.isa b/src/arch/arm/isa/insts/neon64.isa
index b9729a160f..702c128ccf 100644
--- a/src/arch/arm/isa/insts/neon64.isa
+++ b/src/arch/arm/isa/insts/neon64.isa
@@ -351,7 +351,7 @@ let {{
         global header_output, exec_output
         eWalkCode = simd64EnabledCheckCode + '''
         RegVect srcReg1;
-        BigRegVect destReg;
+        BigRegVect destReg = {0};
         '''
         destReg = 0 if not hi else 2
         for reg in range(2):
@@ -632,7 +632,7 @@ let {{
         global header_output, exec_output
         eWalkCode = simd64EnabledCheckCode + '''
         RegVect srcRegs;
-        BigRegVect destReg;
+        BigRegVect destReg = {0};
         '''
         for reg in range(rCount):
             eWalkCode += '''