diff --git a/src/cc65/coptstop.c b/src/cc65/coptstop.c
index 41dfb5526..59bbe6dc9 100644
--- a/src/cc65/coptstop.c
+++ b/src/cc65/coptstop.c
@@ -1732,7 +1732,7 @@ unsigned OptStackOps (CodeSeg* S)
     int             I;
     int             OldEntryCount;      /* Old number of entries */
     unsigned        Used;               /* What registers would be used */
-    unsigned        PushedRegs;         /* Track if the same regs are used after the push */
+    unsigned        PushedRegs = 0;     /* Track if the same regs are used after the push */
     int             RhsAChgIndex;       /* Track if rhs is changed more than once */
     int             RhsXChgIndex;       /* Track if rhs is changed more than once */
     int             IsRegAOptFunc = 0;  /* Whether to use the RegA-only optimizations */
diff --git a/src/cc65/expr.c b/src/cc65/expr.c
index 7ddd8f43a..1c8c25020 100644
--- a/src/cc65/expr.c
+++ b/src/cc65/expr.c
@@ -3871,8 +3871,8 @@ static void hieOr (ExprDesc *Expr)
 static void hieQuest (ExprDesc* Expr)
 /* Parse the ternary operator */
 {
-    int         FalseLab;
-    int         TrueLab;
+    int         FalseLab = 0;
+    int         TrueLab = 0;
     CodeMark    SkippedBranch;
     CodeMark    TrueCodeEnd;
     ExprDesc    Expr2;          /* Expression 2 */