diff --git a/ChangeLog.txt b/ChangeLog.txt
index 3a1b753e48..fd8e471ea8 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -7,6 +7,13 @@
    Entries may not always be in chronological/commit order.
    See license at the end of file. */
 
+2018-03-16 19:10 UTC+0200 Phil Krylov (phil a t newstar.rinet.ru)
+  * include/hbexprb.c
+  * src/compiler/complex.c
+  * src/vm/memvars.c
+  * src/vm/strapi.c
+    ! fixed compiler warnings emitted by GCC 7+
+
 2018-02-23 15:15 UTC+0200 Alexey Myronenko (m.oleksa/at/ukr.net)
   * src/debug/dbgwa.prg
     ! fixed position of the cursor in (reopened) F6-WA window
diff --git a/include/hbexprb.c b/include/hbexprb.c
index ecef9a9b0f..efda8c8279 100644
--- a/include/hbexprb.c
+++ b/include/hbexprb.c
@@ -900,6 +900,7 @@ static HB_EXPR_FUNC( hb_compExprUseRef )
       case HB_EA_PUSH_POP:
       case HB_EA_STATEMENT:
          hb_compWarnMeaningless( HB_COMP_PARAM, pSelf );
+         /* fallthrough */
       case HB_EA_DELETE:
          HB_COMP_EXPR_FREE( pSelf->value.asReference );
          break;
diff --git a/src/compiler/complex.c b/src/compiler/complex.c
index 66c859832a..028bc677fa 100644
--- a/src/compiler/complex.c
+++ b/src/compiler/complex.c
@@ -837,6 +837,7 @@ int hb_comp_yylex( YYSTYPE * yylval_ptr, HB_COMP_DECL )
 
       case HB_PP_TOKEN_EOL:
          pLex->fEol = HB_TRUE;
+         /* fallthrough */
       case HB_PP_TOKEN_EOC:
          pLex->iState = LOOKUP;
          return ( HB_UCHAR ) pToken->value[ 0 ];
diff --git a/src/vm/memvars.c b/src/vm/memvars.c
index 4a498515a2..5dcd53c1b4 100644
--- a/src/vm/memvars.c
+++ b/src/vm/memvars.c
@@ -574,7 +574,7 @@ char * hb_memvarGetStrValuePtr( char * szVarName, HB_SIZE * pnLen )
    PHB_DYNS pDynVar;
    char * szValue = NULL;
 
-   HB_TRACE( HB_TR_DEBUG, ( "hb_memvarGetStrValuePtr(%s, %p)", ( void * ) szVarName, ( void * ) pnLen ) );
+   HB_TRACE( HB_TR_DEBUG, ( "hb_memvarGetStrValuePtr(%s, %p)", szVarName, ( void * ) pnLen ) );
 
    pDynVar = hb_memvarFindSymbol( szVarName, *pnLen );
 
diff --git a/src/vm/strapi.c b/src/vm/strapi.c
index 22e962dcb4..d9a0698964 100644
--- a/src/vm/strapi.c
+++ b/src/vm/strapi.c
@@ -881,7 +881,7 @@ void hb_retstrlen( void * cdp, const char * szText, HB_SIZE nLen )
 {
    HB_STACK_TLS_PRELOAD
 
-   HB_TRACE( HB_TR_DEBUG, ( "hb_retstrlen(%p,%s,%" HB_PFS "u)", cdp, ( const void * ) szText, nLen ) );
+   HB_TRACE( HB_TR_DEBUG, ( "hb_retstrlen(%p,%s,%" HB_PFS "u)", cdp, szText, nLen ) );
 
    hb_itemPutStrLen( hb_stackReturnItem(), cdp, szText, nLen );
 }
@@ -909,7 +909,7 @@ int hb_storstr( void * cdp, const char * szText, int iParam )
 {
    HB_STACK_TLS_PRELOAD
 
-   HB_TRACE( HB_TR_DEBUG, ( "hb_storstr(%p,%s,%d)", cdp, ( const void * ) szText, iParam ) );
+   HB_TRACE( HB_TR_DEBUG, ( "hb_storstr(%p,%s,%d)", cdp, szText, iParam ) );
 
    if( iParam == -1 )
    {
@@ -991,7 +991,7 @@ int hb_storstrlen( void * cdp, const char * szText, HB_SIZE nLen, int iParam )
 {
    HB_STACK_TLS_PRELOAD
 
-   HB_TRACE( HB_TR_DEBUG, ( "hb_storstrlen(%p,%s,%" HB_PFS "u,%d)", cdp, ( const void * ) szText, nLen, iParam ) );
+   HB_TRACE( HB_TR_DEBUG, ( "hb_storstrlen(%p,%s,%" HB_PFS "u,%d)", cdp, szText, nLen, iParam ) );
 
    if( iParam == -1 )
    {