diff --git a/dlls/crtdll/crtdll.spec b/dlls/crtdll/crtdll.spec
index 580ce1fedf0..a33cf47ee2f 100644
--- a/dlls/crtdll/crtdll.spec
+++ b/dlls/crtdll/crtdll.spec
@@ -346,7 +346,7 @@
 @ cdecl asin(double) msvcrt.asin
 @ cdecl atan(double) msvcrt.atan
 @ cdecl atan2(double double) msvcrt.atan2
-@ cdecl atexit(ptr) msvcrt.atexit
+@ cdecl -private atexit(ptr) msvcrt.atexit
 @ cdecl atof(str) msvcrt.atof
 @ cdecl atoi(str) msvcrt.atoi
 @ cdecl atol(str) msvcrt.atol
diff --git a/dlls/msvcr100/msvcr100.spec b/dlls/msvcr100/msvcr100.spec
index c87a03d82af..d8627d20fe3 100644
--- a/dlls/msvcr100/msvcr100.spec
+++ b/dlls/msvcr100/msvcr100.spec
@@ -1635,7 +1635,7 @@
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
 @ cdecl atan2(double double) MSVCRT_atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index c1bf3690538..bf82d30c481 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -1993,7 +1993,7 @@
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
 @ cdecl atan2(double double) MSVCRT_atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index 6c0432d9642..b7381552051 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -2028,7 +2028,7 @@
 @ stub atanh
 @ stub atanhf
 @ stub atanhl
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcr120_app/msvcr120_app.spec b/dlls/msvcr120_app/msvcr120_app.spec
index 80091c56c45..ec18f21f46a 100644
--- a/dlls/msvcr120_app/msvcr120_app.spec
+++ b/dlls/msvcr120_app/msvcr120_app.spec
@@ -1694,7 +1694,7 @@
 @ stub atanh
 @ stub atanhf
 @ stub atanhl
-@ cdecl atexit(ptr) msvcr120.atexit
+@ cdecl -private atexit(ptr) msvcr120.atexit
 @ cdecl atof(str) msvcr120.atof
 @ cdecl atoi(str) msvcr120.atoi
 @ cdecl atol(str) msvcr120.atol
diff --git a/dlls/msvcr70/msvcr70.spec b/dlls/msvcr70/msvcr70.spec
index 026d6579513..e1911d05094 100644
--- a/dlls/msvcr70/msvcr70.spec
+++ b/dlls/msvcr70/msvcr70.spec
@@ -686,7 +686,7 @@
 @ cdecl asin(double) MSVCRT_asin
 @ cdecl atan(double) MSVCRT_atan
 @ cdecl atan2(double double) MSVCRT_atan2
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcr71/msvcr71.spec b/dlls/msvcr71/msvcr71.spec
index 6ebaa3208c7..c3ed3a418b9 100644
--- a/dlls/msvcr71/msvcr71.spec
+++ b/dlls/msvcr71/msvcr71.spec
@@ -682,7 +682,7 @@
 @ cdecl asin(double) MSVCRT_asin
 @ cdecl atan(double) MSVCRT_atan
 @ cdecl atan2(double double) MSVCRT_atan2
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcr80/msvcr80.spec b/dlls/msvcr80/msvcr80.spec
index 1d2e533c0a9..510703825d4 100644
--- a/dlls/msvcr80/msvcr80.spec
+++ b/dlls/msvcr80/msvcr80.spec
@@ -1318,7 +1318,7 @@
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
 @ cdecl atan2(double double) MSVCRT_atan2
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcr90/msvcr90.spec b/dlls/msvcr90/msvcr90.spec
index e660c379568..30bfbcd379d 100644
--- a/dlls/msvcr90/msvcr90.spec
+++ b/dlls/msvcr90/msvcr90.spec
@@ -1290,7 +1290,7 @@
 @ cdecl -arch=arm,x86_64 asinf(float) MSVCRT_asinf
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcrt/msvcrt.spec b/dlls/msvcrt/msvcrt.spec
index dd451a37d8a..67b5c8c2673 100644
--- a/dlls/msvcrt/msvcrt.spec
+++ b/dlls/msvcrt/msvcrt.spec
@@ -1253,7 +1253,7 @@
 @ cdecl -arch=arm,x86_64 asinf(float) MSVCRT_asinf
 @ cdecl -arch=arm,x86_64 atanf(float) MSVCRT_atanf
 @ cdecl -arch=arm,x86_64 atan2f(float float) MSVCRT_atan2f
-@ cdecl atexit(ptr) MSVCRT_atexit
+@ cdecl -private atexit(ptr) MSVCRT_atexit  # not imported to avoid conflicts with Mingw
 @ cdecl atof(str) MSVCRT_atof
 @ cdecl atoi(str) MSVCRT_atoi
 @ cdecl atol(str) ntdll.atol
diff --git a/dlls/msvcrt20/msvcrt20.spec b/dlls/msvcrt20/msvcrt20.spec
index ef76adf835a..cc66e2d600c 100644
--- a/dlls/msvcrt20/msvcrt20.spec
+++ b/dlls/msvcrt20/msvcrt20.spec
@@ -1274,7 +1274,7 @@
 @ cdecl asin(double) msvcrt.asin
 @ cdecl atan(double) msvcrt.atan
 @ cdecl atan2(double double) msvcrt.atan2
-@ cdecl atexit(ptr) msvcrt.atexit
+@ cdecl -private atexit(ptr) msvcrt.atexit
 @ cdecl atof(str) msvcrt.atof
 @ cdecl atoi(str) msvcrt.atoi
 @ cdecl atol(str) msvcrt.atol
diff --git a/dlls/msvcrt40/msvcrt40.spec b/dlls/msvcrt40/msvcrt40.spec
index 2e20f80039d..35cc38826de 100644
--- a/dlls/msvcrt40/msvcrt40.spec
+++ b/dlls/msvcrt40/msvcrt40.spec
@@ -1342,7 +1342,7 @@
 @ cdecl asin(double) msvcrt.asin
 @ cdecl atan(double) msvcrt.atan
 @ cdecl atan2(double double) msvcrt.atan2
-@ cdecl atexit(ptr) msvcrt.atexit
+@ cdecl -private atexit(ptr) msvcrt.atexit
 @ cdecl atof(str) msvcrt.atof
 @ cdecl atoi(str) msvcrt.atoi
 @ cdecl atol(str) msvcrt.atol
diff --git a/dlls/msvcrtd/msvcrtd.spec b/dlls/msvcrtd/msvcrtd.spec
index 91a6090d2bf..61c40d089c1 100644
--- a/dlls/msvcrtd/msvcrtd.spec
+++ b/dlls/msvcrtd/msvcrtd.spec
@@ -638,7 +638,7 @@
 @ cdecl asin(double) msvcrt.asin
 @ cdecl atan(double) msvcrt.atan
 @ cdecl atan2(double double) msvcrt.atan2
-@ cdecl atexit(ptr) msvcrt.atexit
+@ cdecl -private atexit(ptr) msvcrt.atexit
 @ cdecl atof(str) msvcrt.atof
 @ cdecl atoi(str) msvcrt.atoi
 @ cdecl atol(str) msvcrt.atol