diff --git a/src/xspice/icm/analog/pwl/cfunc.mod b/src/xspice/icm/analog/pwl/cfunc.mod
index 9a2ee5d99..92052ee46 100644
--- a/src/xspice/icm/analog/pwl/cfunc.mod
+++ b/src/xspice/icm/analog/pwl/cfunc.mod
@@ -259,8 +259,10 @@ void cm_pwl(ARGS)  /* structure holding parms,
     double lower_slope;     /* slope of the lower segment */
     double upper_slope;     /* slope of the upper segment */
     double x_input;         /* input */
-    double out;             /* output */
-    double dout_din;        /* partial derivative of the output wrt input */
+    double out = 0.0;       /* output
+                             * Init to 0 to suppress compiler warning */
+    double dout_din = 0.0;  /* partial derivative of the output wrt input.
+                             * Init to 0 to suppress compiler warning */
     double threshold_lower; /* value below which the output begins smoothing */
     double threshold_upper; /* value above which the output begins smoothing */
     double test1;           /* debug testing value */
diff --git a/src/xspice/icm/digital/d_jkff/cfunc.mod b/src/xspice/icm/digital/d_jkff/cfunc.mod
index 26678c20e..2341b8f87 100644
--- a/src/xspice/icm/digital/d_jkff/cfunc.mod
+++ b/src/xspice/icm/digital/d_jkff/cfunc.mod
@@ -187,7 +187,7 @@ static Digital_State_t cm_eval_jk_result(Digital_State_t j_input,
                                          Digital_State_t k_input,
                                          Digital_State_t old_output)
 {                                                          
-    Digital_State_t     output; /* returned output value */
+    Digital_State_t output = UNKNOWN; /* returned output value */
 
 
     switch (j_input) {
@@ -228,7 +228,6 @@ static Digital_State_t cm_eval_jk_result(Digital_State_t j_input,
     }
     
     return output;
-
 }
 
 /*==============================================================================
diff --git a/src/xspice/icm/digital/d_tff/cfunc.mod b/src/xspice/icm/digital/d_tff/cfunc.mod
index 5d09568e0..ec4cc84b0 100644
--- a/src/xspice/icm/digital/d_tff/cfunc.mod
+++ b/src/xspice/icm/digital/d_tff/cfunc.mod
@@ -580,6 +580,7 @@ void cm_d_tff(ARGS)
                             temp = *out_old;
                             break;
                         case UNKNOWN:
+                        default:
                             temp = UNKNOWN;
                             break;
                         }