diff --git a/src/schema_compile_node.c b/src/schema_compile_node.c
index ccca636..a060aa1 100644
--- a/src/schema_compile_node.c
+++ b/src/schema_compile_node.c
@@ -451,7 +451,7 @@
 {
     LY_ERR ret = LY_SUCCESS;
     char *valcopy = NULL;
-    size_t len;
+    size_t len = 0;
 
     if (value) {
         ret = range_part_check_value_syntax(ctx, basetype, frdigits, *value, &len, &valcopy);
@@ -1157,8 +1157,8 @@
 {
     LY_ERR ret = LY_SUCCESS;
     LY_ARRAY_COUNT_TYPE u, v, match = 0;
-    int32_t value = 0, cur_val;
-    uint32_t position = 0, cur_pos;
+    int32_t value = 0, cur_val = 0;
+    uint32_t position = 0, cur_pos = 0;
     struct lysc_type_bitenum_item *e, storage;
     ly_bool enabled;
 
@@ -2496,7 +2496,7 @@
     LY_ERR ret = LY_EVALID;
     const char *name, *prefix, *id;
     size_t name_len, prefix_len;
-    const struct lys_module *mod;
+    const struct lys_module *mod = NULL;
     const char *nodeid_type;
     uint32_t getnext_extra_flag = 0;
     uint16_t current_nodetype = 0;