diff --git a/src/stdlib/SDL_string.c b/src/stdlib/SDL_string.c
index b36b64998..02a93a5d9 100644
--- a/src/stdlib/SDL_string.c
+++ b/src/stdlib/SDL_string.c
@@ -511,7 +511,15 @@ long SDL_strtol(const char *string, char **endp, int base)
     size_t len;
     long value;
 
-    len = SDL_ScanLong(string, base ? base : 10, &value);
+    if ( !base ) {
+        if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) {
+            base = 16;
+        } else {
+            base = 10;
+        }
+    }
+
+    len = SDL_ScanLong(string, base, &value);
     if ( endp ) {
         *endp = (char *)string + len;
     }
@@ -525,7 +533,15 @@ unsigned long SDL_strtoul(const char *string, char **endp, int base)
     size_t len;
     unsigned long value;
 
-    len = SDL_ScanUnsignedLong(string, base ? base : 10, &value);
+    if ( !base ) {
+        if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) {
+            base = 16;
+        } else {
+            base = 10;
+        }
+    }
+
+    len = SDL_ScanUnsignedLong(string, base, &value);
     if ( endp ) {
         *endp = (char *)string + len;
     }
@@ -593,7 +609,15 @@ Sint64 SDL_strtoll(const char *string, char **endp, int base)
     size_t len;
     Sint64 value;
 
-    len = SDL_ScanLongLong(string, base ? base : 10, &value);
+    if ( !base ) {
+        if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) {
+            base = 16;
+        } else {
+            base = 10;
+        }
+    }
+
+    len = SDL_ScanLongLong(string, base, &value);
     if ( endp ) {
         *endp = (char *)string + len;
     }
@@ -607,7 +631,15 @@ Uint64 SDL_strtoull(const char *string, char **endp, int base)
     size_t len;
     Uint64 value;
 
-    len = SDL_ScanUnsignedLongLong(string, base ? base : 10, &value);
+    if ( !base ) {
+        if ( (SDL_strlen(string) > 2) && (SDL_strncmp(string, "0x", 2) == 0) ) {
+            base = 16;
+        } else {
+            base = 10;
+        }
+    }
+
+    len = SDL_ScanUnsignedLongLong(string, base, &value);
     if ( endp ) {
         *endp = (char *)string + len;
     }