diff --git a/compilers/imcc/optimizer.c b/compilers/imcc/optimizer.c
index 264b778571..743458781e 100644
--- a/compilers/imcc/optimizer.c
+++ b/compilers/imcc/optimizer.c
@@ -928,7 +928,6 @@ IMCC_subst_constants(ARGMOD(imc_info_t *imcc), ARGMOD(IMC_Unit *unit),
 
     size_t i;
     char op[20];
-    const char *fmt = FLOATVAL_FMT;
     const char *debug_fmt = NULL;   /* gcc -O uninit warn */
     int found, branched;
 
@@ -1040,7 +1039,7 @@ IMCC_subst_constants(ARGMOD(imc_info_t *imcc), ARGMOD(IMC_Unit *unit),
             r[1] = mk_const(imcc, b, r[0]->set);
             break;
           case 'N':
-            snprintf(b, sizeof (b), fmt, REG_NUM(imcc->interp, 0));
+            snprintf(b, sizeof (b), FLOATVAL_FMT, REG_NUM(imcc->interp, 0));
             r[1] = mk_const(imcc, b, r[0]->set);
             break;
           case 'S':
diff --git a/src/call/context.c b/src/call/context.c
index 04d5dc0a64..43420a7eca 100644
--- a/src/call/context.c
+++ b/src/call/context.c
@@ -235,7 +235,7 @@ init_context(ARGMOD(PMC *pmcctx), ARGIN_NULLOK(PMC *pmcold))
     PARROT_ASSERT(PMC_IS_NULL(pmcold) || pmcold->vtable->base_type == enum_class_CallContext);
 
     /*
-     * FIXME Invoking corotine shouldn't initialise context. So just
+     * FIXME Invoking coroutine shouldn't initialise context. So just
      * check ctx->current_sub. If it's not null return from here
      */
     if (!PMC_IS_NULL(ctx->current_sub))
@@ -757,7 +757,7 @@ Parrot_pcc_get_regs_used(SHIM_INTERP, ARGIN(const PMC *ctx), int type)
 
 =item C<Regs_ni* Parrot_pcc_get_regs_ni(PARROT_INTERP, const PMC *ctx)>
 
-Get pointer to FLOANFAL and INTVAL registers.
+Get pointer to FLOATVAL and INTVAL registers.
 
 =cut
 
diff --git a/src/io/api.c b/src/io/api.c
index f9c02cdf0f..11d746996e 100644
--- a/src/io/api.c
+++ b/src/io/api.c
@@ -1374,7 +1374,7 @@ Parrot_io_pprintf(PARROT_INTERP, PIOHANDLE os_handle, ARGIN(const char *s), ...)
 =item C<INTVAL Parrot_io_printf(PARROT_INTERP, const char *s, ...)>
 
 Writes a C string format with varargs to C<stdout>. This routine uses
-Parrot_io_write_s to perform the actual right, and is therefore subject to
+Parrot_io_write_s to perform the actual write, and is therefore subject to
 all the same semantics and limitations.
 
 =cut