diff --git a/main.c b/main.c
index 4c66b7d..e103ed4 100644
--- a/main.c
+++ b/main.c
@@ -136,6 +136,12 @@ struct fh_instruction_s {
   uint32_t data;
 };
 
+static inline void instr_init(struct fh_instruction_s *instr, enum fb_instruction_kind kind, uint32_t data)
+{
+  instr->kind = kind;
+  instr->data = data;
+}
+
 #define INSTR_SIZE (sizeof(struct fh_instruction_s))
 
 /** Bytecode word indices that are not in the dict, have special effect */
@@ -492,6 +498,7 @@ enum fh_error w_user_word(struct fh_thread_s *fh)
     case FH_INSTR_WORD:
       wn = instr->data;
       switch (wn) {
+        /* special case for strings stored in compile memory */
         case CPLWORD_ALLOCSTR:
         case CPLWORD_TYPESTR:
           strl = *((uint32_t *) &fh->compile[fh->execptr]);
@@ -555,7 +562,6 @@ enum fh_error w_colon(struct fh_thread_s *fh)
 enum fh_error w_semicolon(struct fh_thread_s *fh)
 {
   enum fh_error rv;
-  uint32_t addr = 0;
   struct fh_instruction_s instr;
 
   if (fh->state != FH_STATE_COMPILE) {
@@ -651,20 +657,20 @@ enum fh_error register_builtin_words(struct fh_thread_s *fh)
       {"s\"",   w_s_quote,   1},
       {".\"",   w_dot_quote, 1},
       /* Compiler control words */
-      {"bye",   w_bye},
+      {"bye",   w_bye,       0},
       /* Basic arithmetics */
-      {"+",     w_add},
-      {"-",     w_sub},
-      {"*",     w_mul},
+      {"+",     w_add,       0},
+      {"-",     w_sub,       0},
+      {"*",     w_mul,       0},
       /* Control words */
-      {":",     w_colon},
+      {":",     w_colon,     0},
       {";",     w_semicolon, 1},
-      {".",     w_dot},
-      {"type",  w_type},
-      {"cr",    w_cr},
-      {"space", w_space},
-      {"\\",    w_backslash}, // line comment
-      {"(",     w_paren}, // enclosed comment
+      {".",     w_dot,       0},
+      {"type",  w_type,      0},
+      {"cr",    w_cr,        0},
+      {"space", w_space,     0},
+      {"\\",    w_backslash, 0}, // line comment
+      {"(",     w_paren,     0}, // enclosed comment
       { /* end marker */ }
   };
 
@@ -730,10 +736,11 @@ static enum fh_error fh_handle_quoted_string(
   } else {
     LOG("Compile a string");
     /* compile */
-    instr.kind = FH_INSTR_WORD;
-    instr.data = fh->substate == FH_SUBSTATE_SQUOTE ?
-                 CPLWORD_ALLOCSTR :
-                 CPLWORD_TYPESTR;
+    if (fh->substate == FH_SUBSTATE_SQUOTE) {
+      instr_init(&instr, FH_INSTR_WORD, CPLWORD_ALLOCSTR);
+    } else {
+      instr_init(&instr, FH_INSTR_WORD, CPLWORD_TYPESTR);
+    }
     uint32_t len32 = len;
     /* string is encoded as a special compiler command, the size,
      * and then the string, all 4-byte aligned. */
@@ -758,18 +765,17 @@ static enum fh_error fh_handle_word(
   }
 
   /* First, try if it's a known word */
+  // TODO we could use binary search if the dict was ordered
   struct fh_word_s *w = &fh->dict[0];
   struct fh_instruction_s instr;
   uint32_t cnt = 0;
-  uint32_t addr = 0;
   enum fh_error rv;
   while (w->handler) {
     if (0 == strncasecmp(start, w->name, len) && w->name[len] == 0) {
       // word found!
       if (fh->state == FH_STATE_COMPILE && !w->immediate) {
         LOG("Compile word call: %s", w->name);
-        instr.kind = FH_INSTR_WORD;
-        instr.data = cnt;
+        instr_init(&instr, FH_INSTR_WORD, cnt);
         TRY(fh_compile_put(fh, &instr, INSTR_SIZE));
       } else {
         /* interpret */
@@ -794,8 +800,7 @@ static enum fh_error fh_handle_word(
 
   if (fh->state == FH_STATE_COMPILE) {
     LOG("Compile number: %ld", v);
-    instr.kind = FH_INSTR_NUMBER;
-    instr.data = (uint32_t) v;
+    instr_init(&instr, FH_INSTR_NUMBER, (uint32_t) v);
     TRY(fh_compile_put(fh, &instr, INSTR_SIZE));
   } else {
     /* interpret */
@@ -986,12 +991,8 @@ int main(int argc, char *argv[])
 
   // Show resource usage
   LOG("\nResources used: DS %dW, RS %dW, CS %dW, heap %dB, program %dB, dict %dx\n",
-      (int) fh.data_stack_hwm,
-      (int) fh.return_stack_hwm,
-      (int) fh.control_stack_hwm,
-      (int) fh.heap_top,
-      (int) fh.compile_top,
-      (int) fh.dict_top);
+      (int) fh.data_stack_hwm, (int) fh.return_stack_hwm, (int) fh.control_stack_hwm,
+      (int) fh.heap_top, (int) fh.compile_top, (int) fh.dict_top);
 
   FHPRINT_SVC("Bye.\n");
   return 0;