diff --git a/cfg/std.cfg b/cfg/std.cfg
index acf00daa2..037400bb1 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -15,6 +15,16 @@
       <not-bool/>
     </arg>
   </function>
+  <!-- intmax_t imaxabs(intmax_t n); -->
+  <function name="imaxabs,std::imaxabs">
+    <use-retval/>
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+  </function>
   <!-- std::proj(std::complex) -->
   <function name="std::proj">
     <use-retval/>
@@ -634,6 +644,19 @@
       <valid>:-1,1:</valid>
     </arg>
   </function>
+  <!-- imaxdiv_t imaxdiv (intmax_t numer, intmax_t denom); -->
+  <function name="imaxdiv,std::imaxdiv">
+    <pure/>
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <arg nr="1">
+      <not-uninit/>
+    </arg>
+    <arg nr="2">
+      <not-uninit/>
+      <valid>:-1,1:</valid>
+    </arg>
+  </function>
   <!-- void exit(int status); -->
   <function name="exit,std::exit">
     <noreturn>true</noreturn>
@@ -3414,7 +3437,9 @@
   <!-- unsigned long strtoul(const char *s, char **endp, int base); -->
   <!-- long long strtoll(const char *s, char **endp, int base); -->
   <!-- unsigned long long strtoull(const char *s, char **endp, int base); -->
-  <function name="strtol,std::strtol,strtoul,std::strtoul,strtoll,std::strtoll,strtoull,std::strtoull">
+  <!-- intmax_t strtoimax (const char* str, char** endptr, int base); -->
+  <!-- uintmax_t strtoumax (const char* str, char** endptr, int base); -->
+  <function name="strtol,std::strtol,strtoul,std::strtoul,strtoll,std::strtoll,strtoull,std::strtoull,strtoimax,std::strtoimax,strtoumax,std::strtoumax">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <arg nr="1">
@@ -3593,7 +3618,9 @@
   <!-- long long wcstoll(const wchar_t *s, wchar ** endp, int base); -->
   <!-- unsigned long wcstoul(const wchar_t *s, wchar ** endp, int base); -->
   <!-- unsigned long long wcstoull(const wchar_t *s, wchar ** endp, int base); -->
-  <function name="wcstol,std::wcstol,wcstoll,std::wcstoll,wcstoul,std::wcstoul,wcstoull,std::wcstoull">
+  <!-- intmax_t wcstoimax (const wchar_t* wcs, wchar_t** endptr, int base); -->
+  <!-- uintmax_t wcstoumax (const wchar_t* wcs, wchar_t** endptr, int base); -->
+  <function name="wcstol,std::wcstol,wcstoll,std::wcstoll,wcstoul,std::wcstoul,wcstoull,std::wcstoull,wcstoimax,std::wcstoimax,wcstoumax,std::wcstoumax">
     <use-retval/>
     <noreturn>false</noreturn>
     <leak-ignore/>
diff --git a/test/cfg/std.c b/test/cfg/std.c
index 0be8f321a..6dae1bd2f 100644
--- a/test/cfg/std.c
+++ b/test/cfg/std.c
@@ -17,6 +17,7 @@
 #include <setjmp.h>
 #include <time.h>
 #include <stdbool.h>
+#include <stdint.h>
 
 void bufferAccessOutOfBounds(void)
 {
@@ -191,6 +192,13 @@ void nullpointerMemcmp(char *p)
 
 // uninit pointers
 
+void uninivar_abs(void)
+{
+    int i;
+    // cppcheck-suppress uninitvar
+    (void)abs(i);
+}
+
 void uninit_clearerr(void)
 {
     FILE *fp;
diff --git a/test/cfg/std.cpp b/test/cfg/std.cpp
index f85b1d4a8..8a06c546a 100644
--- a/test/cfg/std.cpp
+++ b/test/cfg/std.cpp
@@ -45,6 +45,15 @@ void uninitvar_abs(void)
     (void)std::abs(i);
 }
 
+void uninivar_imaxabs(void)
+{
+    intmax_t i;
+    // cppcheck-suppress uninitvar
+    (void)std::imaxabs(i);
+    // cppcheck-suppress uninitvar
+    (void)imaxabs(i);
+}
+
 void uninitvar_isalnum(void)
 {
     int i;
@@ -523,6 +532,16 @@ void uninitvar_div(void)
     (void)std::div(num,denom);
 }
 
+void uninitvar_imaxdiv(void)
+{
+    intmax_t numer;
+    intmax_t denom;
+    // cppcheck-suppress uninitvar
+    (void)std::imaxdiv(numer,denom);
+    // cppcheck-suppress uninitvar
+    (void)imaxdiv(numer,denom);
+}
+
 void uninitvar_exit(void)
 {
     int i;
@@ -2447,6 +2466,14 @@ void uninivar_strtol(void)
     (void)std::strtoul(s,endp,base);
     // cppcheck-suppress uninitvar
     (void)std::strtoull(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)std::strtoimax(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)strtoimax(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)std::strtoumax(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)strtoumax(s,endp,base);
 }
 
 void uninitvar_time(void)
@@ -2633,6 +2660,14 @@ void uninivar_wcstol(void)
     (void)std::wcstoul(s,endp,base);
     // cppcheck-suppress uninitvar
     (void)std::wcstoull(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)std::wcstoimax(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)wcstoimax(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)std::wcstoumax(s,endp,base);
+    // cppcheck-suppress uninitvar
+    (void)wcstoumax(s,endp,base);
 }
 
 void uninitvar_wprintf(wchar_t *format, int input)