diff --git a/ipc/chromium/chromium-config.mozbuild b/ipc/chromium/chromium-config.mozbuild
index 9df182cb8752..5b448fe3940f 100644
--- a/ipc/chromium/chromium-config.mozbuild
+++ b/ipc/chromium/chromium-config.mozbuild
@@ -12,7 +12,6 @@ LOCAL_INCLUDES += [
 
 if CONFIG['OS_ARCH'] == 'WINNT':
     OS_LIBS += [
-        'psapi',
         'shell32',
         'dbghelp',
     ]
diff --git a/js/src/build.rs b/js/src/build.rs
index d4e1082321f2..d6ab60f1a92c 100644
--- a/js/src/build.rs
+++ b/js/src/build.rs
@@ -40,7 +40,6 @@ fn main() {
 
     if target.contains("windows") {
         println!("cargo:rustc-link-lib=winmm");
-        println!("cargo:rustc-link-lib=psapi");
         if target.contains("gnu") {
             println!("cargo:rustc-link-lib=stdc++");
         }
diff --git a/js/src/old-configure.in b/js/src/old-configure.in
index c7d3970d44f3..29d451c4a4c0 100644
--- a/js/src/old-configure.in
+++ b/js/src/old-configure.in
@@ -659,7 +659,7 @@ case "$target" in
         # Use temp file for windres (bug 213281)
         RCFLAGS='-O coff --use-temp-file'
         # mingw doesn't require kernel32, user32, and advapi32 explicitly
-        LIBS="$LIBS -lgdi32 -lwinmm -lwsock32 -lpsapi"
+        LIBS="$LIBS -lgdi32 -lwinmm -lwsock32"
         MOZ_FIX_LINK_PATHS=
         DLL_PREFIX=
         IMPORT_LIB_SUFFIX=a
@@ -796,7 +796,7 @@ case "$target" in
         # make 'foo == bar;' error out
         CFLAGS="$CFLAGS -we4553"
         CXXFLAGS="$CXXFLAGS -we4553"
-        LIBS="$LIBS kernel32.lib user32.lib gdi32.lib winmm.lib wsock32.lib advapi32.lib psapi.lib"
+        LIBS="$LIBS kernel32.lib user32.lib gdi32.lib winmm.lib wsock32.lib advapi32.lib"
         MOZ_DEBUG_LDFLAGS='-DEBUG -DEBUGTYPE:CV'
         WARNINGS_AS_ERRORS='-WX'
         MOZ_OPTIMIZE_FLAGS="-O2"
diff --git a/media/webrtc/trunk/build/common.gypi b/media/webrtc/trunk/build/common.gypi
index 2ab21db2ba83..9e94ce9615da 100644
--- a/media/webrtc/trunk/build/common.gypi
+++ b/media/webrtc/trunk/build/common.gypi
@@ -3327,7 +3327,6 @@
           'WIN32',
           '_WINDOWS',
           'NOMINMAX',
-          'PSAPI_VERSION=1',
           '_CRT_RAND_S',
           'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
           'WIN32_LEAN_AND_MEAN',
@@ -3455,7 +3454,6 @@
               'msimg32.lib',
               'ws2_32.lib',
               'usp10.lib',
-              'psapi.lib',
               'dbghelp.lib',
               'winmm.lib',
               'shlwapi.lib',
diff --git a/toolkit/library/moz.build b/toolkit/library/moz.build
index 688feb44cedf..253c773752e1 100644
--- a/toolkit/library/moz.build
+++ b/toolkit/library/moz.build
@@ -27,7 +27,6 @@ def Libxul(name):
         'dbghelp.dll',
         'netapi32.dll',
         'PowrProf.dll',
-        'psapi.dll',
         'rasapi32.dll',
         'rasdlg.dll',
         'secur32.dll',
@@ -340,7 +339,6 @@ if CONFIG['OS_ARCH'] == 'WINNT':
         'msimg32',
         'netapi32',
         'shlwapi',
-        'psapi',
         'ws2_32',
         'dbghelp',
         'rasapi32',