diff --git a/code/nel/src/misc/CMakeLists.txt b/code/nel/src/misc/CMakeLists.txt
index bfa8af849..ab91a9cc0 100644
--- a/code/nel/src/misc/CMakeLists.txt
+++ b/code/nel/src/misc/CMakeLists.txt
@@ -48,17 +48,7 @@ NL_ADD_LIB_SUFFIX(nelmisc)
 
 ADD_DEFINITIONS(${LIBXML2_DEFINITIONS})
 
-IF(WITH_STATIC)
-# acemtp: it's because my gcc is too old and cannot optimize this file
-# on old gcc used to compile static ryzom, if you compile rgba with full optim, there's a visual bug (blue people)
-SET_SOURCE_FILES_PROPERTIES(rgba.cpp PROPERTIES COMPILE_FLAGS "-O0")
-ENDIF(WITH_STATIC)
-
-IF(WITH_PCH AND NOT WITH_STATIC)
-# acemtp: it's because my gcc is too old and cannot optimize this file
-# removed the pch or we cannot define -O0 for the rgba specificaly
 ADD_NATIVE_PRECOMPILED_HEADER(nelmisc ${CMAKE_CURRENT_SOURCE_DIR}/stdmisc.h ${CMAKE_CURRENT_SOURCE_DIR}/stdmisc.cpp)
-ENDIF(WITH_PCH AND NOT WITH_STATIC)
 
 NL_GEN_PC(nel-misc.pc)
 INSTALL(TARGETS nelmisc LIBRARY DESTINATION lib ARCHIVE DESTINATION lib COMPONENT libraries)
diff --git a/code/nel/src/misc/rgba.cpp b/code/nel/src/misc/rgba.cpp
index 581d7d3f3..4ea71f307 100644
--- a/code/nel/src/misc/rgba.cpp
+++ b/code/nel/src/misc/rgba.cpp
@@ -639,7 +639,7 @@ bool CRGBA::convertToHLS(float &h, float &l, float &s) const
 	{
 		h = 2.f + (b - r) / diff;
 	}
-	else
+	else if (maxV == b)
 	{
 		h = 4.f + (r - g) / diff;
 	}