diff --git a/arch/arm64/src/common/arm64_backtrace.c b/arch/arm64/src/common/arm64_backtrace.c
index 60406f7f4d..b8b6875479 100644
--- a/arch/arm64/src/common/arm64_backtrace.c
+++ b/arch/arm64/src/common/arm64_backtrace.c
@@ -53,7 +53,7 @@ static int backtrace(uintptr_t *base, uintptr_t *limit,
 
   if (pc)
     {
-      if (*skip-- <= 0)
+      if ((*skip)-- <= 0)
         {
           buffer[i++] = pc;
         }
@@ -66,7 +66,7 @@ static int backtrace(uintptr_t *base, uintptr_t *limit,
           break;
         }
 
-      if (*skip-- <= 0)
+      if ((*skip)-- <= 0)
         {
           buffer[i++] = (void *)*(fp + 1);
         }