diff --git a/rtdata/languages/default b/rtdata/languages/default
index a6d2b5d16..b012dfdac 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -2423,6 +2423,7 @@ TP_LOCALLAB_EXPCBDL_TOOLTIP;In the case of contaminated sensor (type "grease"),
 TP_LOCALLAB_EXPCHROMA;Chroma compensation
 TP_LOCALLAB_EXPCOLOR_TOOLTIP;In the case of small defects.\n\nRed-eyes : red-centered circular selector, spot delimiters close to the eye, weak scope, "lightness" -100, "chrominance" -100.\n\nSpotIR :Circular selector centered on the defect, spot delimiters close to the default - reduce "chrominance", possibly act on "scope" to reduce the extent of the action.\n\nDust - grease (small) :Circular selector centered on the defect (adapt the size of the spot), spot delimiters not too close to the defect to allow an inconspicuous transition. a) "Transition" (low values) and "Transition weak" (high values); b) act on "lightness" and possibly on "chrominance" or "Color correction grid - direct" to approach the rendering of the polluted zone to that of the healthy zone; c) act moderately on "scope" to modulate the desired action.\n\nYou can also complete with Gaussian blur (Smooth Blur and noise)
 TP_LOCALLAB_EXPCONTRAST_TOOLTIP;Avoid spots that are too small(< 32x32 pixels).\nUse low transition values and high weakening transition values and scope to simulate small RT-spot and deal wth defects.\nUse if necessary the module 'Clarity & Sharp mask and Blend images' by adjusting 'Soft radius' to reduce artifacts.
+TP_LOCALLAB_EXPCONTRASTPYR_TOOLTIP;See the documentation of wavelet levels or denoise.\nHowever there are some differences: more tools and closer to the details for denoise.\nTone mapping for wavelet levels. 
 TP_LOCALLAB_EXPCURV;Curves
 TP_LOCALLAB_EXPGRAD;Graduated Filter
 TP_LOCALLAB_EXPLAP_TOOLTIP;The more you act on this threshold slider, the greater the action of reducing contrast.
diff --git a/rtgui/locallabtools2.cc b/rtgui/locallabtools2.cc
index a457ca7cf..8ac385623 100644
--- a/rtgui/locallabtools2.cc
+++ b/rtgui/locallabtools2.cc
@@ -2546,6 +2546,8 @@ void LocallabContrast::updateAdviceTooltips(const bool showTooltips)
         LLmasklcshape->setTooltip(M("TP_LOCALLAB_CURVEEDITOR_CC_TOOLTIP"));
         HHmasklcshape->setTooltip(M("TP_LOCALLAB_CURVEEDITOR_CC_TOOLTIP"));
         Lmasklcshape->setTooltip(M("TP_LOCALLAB_LMASK_LL_TOOLTIP"));
+        expcontrastpyr->set_tooltip_text(M("TP_LOCALLAB_EXPCONTRASTPYR_TOOLTIP"));
+        expcontrastpyr2->set_tooltip_text(M("TP_LOCALLAB_EXPCONTRASTPYR_TOOLTIP"));
     } else {
         exp->set_tooltip_text("");
         levelwav->set_tooltip_text("");
@@ -2560,6 +2562,8 @@ void LocallabContrast::updateAdviceTooltips(const bool showTooltips)
         LLmasklcshape->setTooltip("");
         HHmasklcshape->setTooltip("");
         Lmasklcshape->setTooltip("");
+        expcontrastpyr->set_tooltip_text(M(""));
+        expcontrastpyr2->set_tooltip_text(M(""));
     }
 }