diff --git a/dlls/api-ms-win-crt-utility-l1-1-0/api-ms-win-crt-utility-l1-1-0.spec b/dlls/api-ms-win-crt-utility-l1-1-0/api-ms-win-crt-utility-l1-1-0.spec
index b34147be5fe..c81c3d42127 100644
--- a/dlls/api-ms-win-crt-utility-l1-1-0/api-ms-win-crt-utility-l1-1-0.spec
+++ b/dlls/api-ms-win-crt-utility-l1-1-0/api-ms-win-crt-utility-l1-1-0.spec
@@ -17,7 +17,7 @@
 @ cdecl bsearch(ptr ptr long long ptr) ucrtbase.bsearch
 @ cdecl bsearch_s(ptr ptr long long ptr ptr) ucrtbase.bsearch_s
 @ cdecl -ret64 div(long long) ucrtbase.div
-@ stub imaxabs
+@ cdecl -ret64 imaxabs(int64) ucrtbase.imaxabs
 @ stub imaxdiv
 @ cdecl labs(long) ucrtbase.labs
 @ cdecl -ret64 ldiv(long long) ucrtbase.ldiv
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index dd7d48a8629..1773976481f 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -2210,7 +2210,7 @@
 @ cdecl ilogb(double) MSVCR120_ilogb
 @ cdecl ilogbf(float) MSVCR120_ilogbf
 @ cdecl ilogbl(double) MSVCR120_ilogbl
-@ stub imaxabs
+@ cdecl -ret64 imaxabs(int64) MSVCRT_imaxabs
 @ stub imaxdiv
 @ cdecl is_wctype(long long) MSVCRT_iswctype
 @ cdecl isalnum(long) MSVCRT_isalnum
diff --git a/dlls/msvcr120_app/msvcr120_app.spec b/dlls/msvcr120_app/msvcr120_app.spec
index b8ffbbc7581..8072349d8d0 100644
--- a/dlls/msvcr120_app/msvcr120_app.spec
+++ b/dlls/msvcr120_app/msvcr120_app.spec
@@ -1874,7 +1874,7 @@
 @ cdecl ilogb(double) msvcr120.ilogb
 @ cdecl ilogbf(float) msvcr120.ilogbf
 @ cdecl ilogbl(double) msvcr120.ilogbl
-@ stub imaxabs
+@ cdecl -ret64 imaxabs(int64) msvcr120.imaxabs
 @ stub imaxdiv
 @ cdecl isalnum(long) msvcr120.isalnum
 @ cdecl isalpha(long) msvcr120.isalpha
diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 15d8fa4be72..a9cf224575a 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -1502,6 +1502,16 @@ MSVCRT_longlong CDECL MSVCRT_llabs( MSVCRT_longlong n )
 }
 #endif
 
+#if _MSVCR_VER>=120
+/*********************************************************************
+ *		imaxabs (MSVCR120.@)
+ */
+MSVCRT_intmax_t CDECL MSVCRT_imaxabs( MSVCRT_intmax_t n )
+{
+    return n >= 0 ? n : -n;
+}
+#endif
+
 /*********************************************************************
  *		_abs64 (MSVCRT.@)
  */
diff --git a/dlls/msvcrt/msvcrt.h b/dlls/msvcrt/msvcrt.h
index 6e361201b05..6feb6c873f0 100644
--- a/dlls/msvcrt/msvcrt.h
+++ b/dlls/msvcrt/msvcrt.h
@@ -77,6 +77,7 @@ typedef unsigned int   MSVCRT__fsize_t;
 typedef int            MSVCRT_long;
 typedef unsigned int   MSVCRT_ulong;
 typedef __int64        MSVCRT_longlong;
+typedef long long      MSVCRT_intmax_t;
 #ifdef _WIN64
 typedef unsigned __int64 MSVCRT_size_t;
 typedef __int64 MSVCRT_intptr_t;
diff --git a/dlls/ucrtbase/ucrtbase.spec b/dlls/ucrtbase/ucrtbase.spec
index 689b3d7c951..05ac3d3427a 100644
--- a/dlls/ucrtbase/ucrtbase.spec
+++ b/dlls/ucrtbase/ucrtbase.spec
@@ -2344,7 +2344,7 @@
 @ cdecl ilogb(double) MSVCR120_ilogb
 @ cdecl ilogbf(float) MSVCR120_ilogbf
 @ cdecl ilogbl(double) MSVCR120_ilogbl
-@ stub imaxabs
+@ cdecl -ret64 imaxabs(int64) MSVCRT_imaxabs
 @ stub imaxdiv
 @ cdecl is_wctype(long long) MSVCRT_iswctype
 @ cdecl isalnum(long) MSVCRT_isalnum