diff --git a/src/libslic3r/CMakeLists.txt b/src/libslic3r/CMakeLists.txt
index 1b782a6ee6..6a1bc24d81 100644
--- a/src/libslic3r/CMakeLists.txt
+++ b/src/libslic3r/CMakeLists.txt
@@ -3,9 +3,6 @@ project(libslic3r)
 
 include(PrecompiledHeader)
 
-string(TIMESTAMP COMPILE_TIME %Y%m%d-%H%M%S)
-set(SLIC3R_BUILD_TIME ${COMPILE_TIME})
-
 if(NOT DEFINED ORCA_CHECK_GCODE_PLACEHOLDERS)
     set(ORCA_CHECK_GCODE_PLACEHOLDERS "0")
 endif()
diff --git a/src/libslic3r/libslic3r_version.h.in b/src/libslic3r/libslic3r_version.h.in
index 31af715bc7..a0e82cd9d3 100644
--- a/src/libslic3r/libslic3r_version.h.in
+++ b/src/libslic3r/libslic3r_version.h.in
@@ -9,7 +9,6 @@
     #define GIT_COMMIT_HASH "0000000" // 0000000 means uninitialized
 #endif
 #define SLIC3R_BUILD_ID "@SLIC3R_BUILD_ID@"
-#define SLIC3R_BUILD_TIME "@SLIC3R_BUILD_TIME@"
 //#define SLIC3R_RC_VERSION "@SLIC3R_VERSION@"
 #define BBL_RELEASE_TO_PUBLIC @BBL_RELEASE_TO_PUBLIC@
 #define BBL_INTERNAL_TESTING @BBL_INTERNAL_TESTING@
diff --git a/src/slic3r/GUI/AboutDialog.cpp b/src/slic3r/GUI/AboutDialog.cpp
index 396eda3960..bebf36186e 100644
--- a/src/slic3r/GUI/AboutDialog.cpp
+++ b/src/slic3r/GUI/AboutDialog.cpp
@@ -262,13 +262,6 @@ AboutDialog::AboutDialog()
         vesizer->Add(version, 0, wxRIGHT | wxALIGN_RIGHT, FromDIP(20));
         vesizer->AddSpacer(FromDIP(5));
         vesizer->Add(credits_string, 0, wxRIGHT | wxALIGN_RIGHT, FromDIP(20));
-        // #if BBL_INTERNAL_TESTING
-//         wxString build_time = wxString::Format("Build Time: %s", std::string(SLIC3R_BUILD_TIME));
-//         wxStaticText* build_time_text = new wxStaticText(this, wxID_ANY, build_time, wxDefaultPosition, wxDefaultSize);
-//         build_time_text->SetForegroundColour(wxColour("#FFFFFE"));
-//         build_time_text->SetBackgroundColour(wxColour("#00AF42"));
-//         vesizer->Add(build_time_text, 0, wxALL | wxALIGN_CENTER_HORIZONTAL, FromDIP(5));
-// #endif
         vesizer->Add(0, 0, 1, wxEXPAND, FromDIP(5));
     }