diff --git a/build/windows/installer/files.isi b/build/windows/installer/files.isi
index 0384e6e9e2..9a414c534d 100644
--- a/build/windows/installer/files.isi
+++ b/build/windows/installer/files.isi
@@ -24,6 +24,7 @@ Source: "{#DEPS_DIR}\{#DDIR}\bin\*.dll"; DestDir: "{app}\bin"; Excludes: "\bin\l
 Source: "{#DEPS_DIR}\{#DDIR}\bin\libgs*.dll"; DestDir: "{app}\bin"; Components: gs and deps{#PLATFORM}; Flags: recursesubdirs restartreplace ignoreversion uninsrestartdelete
 #ifdef DEBUG_SYMBOLS
 Source: "{#DEPS_DIR}\{#DDIR}\bin\.debug\*.dll.debug"; DestDir: "{app}\bin\.debug"; Components: deps{#PLATFORM} and debug; Flags: recursesubdirs restartreplace ignoreversion uninsrestartdelete
+Source: "{#DEPS_DIR}\{#DDIR}\lib\*.debug"; DestDir: "{app}\lib"; Components: deps{#PLATFORM} and debug; Flags: recursesubdirs restartreplace ignoreversion uninsrestartdelete
 #endif
 
 Source: "{#DEPS_DIR}\{#DDIR}\bin\gspawn-win*.exe"; DestDir: "{app}\bin"; Components: deps{#PLATFORM}; Flags: recursesubdirs restartreplace ignoreversion uninsrestartdelete