diff --git a/configure.in b/configure.in
index 5c51ec7eb..ce234867d 100644
--- a/configure.in
+++ b/configure.in
@@ -180,7 +180,7 @@ AC_CHECK_FUNCS(memset memcpy memmove memcmp)
 AC_CHECK_FUNCS(strlen strcpy strncpy strcat strncat strdup)
 AC_CHECK_FUNCS(_strrev _strupr _strlwr)
 AC_CHECK_FUNCS(strchr strrchr strstr)
-AC_CHECK_FUNCS(itoa _ltoa _uitoa _ultoa strtol _i64toa _ui64toa strtoll atoi atof)
+AC_CHECK_FUNCS(itoa _ltoa _uitoa _ultoa strtol _i64toa _ui64toa strtoll strtod atoi atof)
 AC_CHECK_FUNCS(strcmp strncmp stricmp strcasecmp)
 AC_CHECK_FUNCS(sscanf snprintf vsnprintf)
 
diff --git a/include/SDL_config.h.in b/include/SDL_config.h.in
index 00892df78..a63e04087 100644
--- a/include/SDL_config.h.in
+++ b/include/SDL_config.h.in
@@ -32,7 +32,6 @@
 #ifdef HAVE_LIBC
 
 
-
 /* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP
    systems. This function is required for `alloca.c' support on those systems.
    */
@@ -177,6 +176,9 @@
 /* Define to 1 if you have the `strstr' function. */
 #undef HAVE_STRSTR
 
+/* Define to 1 if you have the `strtod' function. */
+#undef HAVE_STRTOD
+
 /* Define to 1 if you have the `strtol' function. */
 #undef HAVE_STRTOL
 
@@ -282,7 +284,6 @@
 #undef size_t
 
 
-
 #endif /* HAVE_LIBC */
 
 #endif /* _SDL_config_h */