diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
index 3c70fb2b73b2..e9d42056baec 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/RustClientCodegen.java
@@ -696,10 +696,22 @@ public String getSchemaType(Schema p) {
                 }
             } else {
                 switch (p.getFormat()) {
+                    case "int8":
+                        return unsigned ? "u8" : "i8";
+                    case "int16":
+                        return unsigned ? "u16" : "i16";
                     case "int32":
                         return unsigned ? "u32" : "i32";
                     case "int64":
                         return unsigned ? "u64" : "i64";
+                    case "uint8":
+                        return "u8";
+                    case "uint16":
+                        return "u16";
+                    case "uint32":
+                        return "u32";
+                    case "uint64":
+                        return "u64";
                 }
             }
         }
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/rust/RustClientCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/rust/RustClientCodegenTest.java
index d4bc7c1845ec..3b62552c53b0 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/rust/RustClientCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/rust/RustClientCodegenTest.java
@@ -102,12 +102,30 @@ public void testWithIntegerDefaults() {
         s.setMinimum(BigDecimal.valueOf(0));
         s.setMaximum(BigDecimal.valueOf(1));
 
+        s.setFormat("int8");
+        Assert.assertEquals(codegen.getSchemaType(s), "i8");
+
+        s.setFormat("int16");
+        Assert.assertEquals(codegen.getSchemaType(s), "i16");
+
         s.setFormat("int32");
         Assert.assertEquals(codegen.getSchemaType(s), "i32");
 
         s.setFormat("int64");
         Assert.assertEquals(codegen.getSchemaType(s), "i64");
 
+        s.setFormat("uint8");
+        Assert.assertEquals(codegen.getSchemaType(s), "u8");
+
+        s.setFormat("uint16");
+        Assert.assertEquals(codegen.getSchemaType(s), "u16");
+
+        s.setFormat("uint32");
+        Assert.assertEquals(codegen.getSchemaType(s), "u32");
+
+        s.setFormat("uint64");
+        Assert.assertEquals(codegen.getSchemaType(s), "u64");
+
         // Clear format - should use default of i32
         s.setFormat(null);
 
@@ -181,6 +199,14 @@ public void testWithPreferUnsigned() {
         s.setMaximum(BigDecimal.valueOf(Long.MAX_VALUE));
         Assert.assertEquals(codegen.getSchemaType(s), "u32");
 
+        // Should respect hardcoded 8-bits, but prefer unsigned
+        s.setFormat("int8");
+        Assert.assertEquals(codegen.getSchemaType(s), "u8");
+
+        // Should respect hardcoded 16-bits, but prefer unsigned
+        s.setFormat("int16");
+        Assert.assertEquals(codegen.getSchemaType(s), "u16");
+
         // Should respect hardcoded 32-bits, but prefer unsigned
         s.setFormat("int32");
         Assert.assertEquals(codegen.getSchemaType(s), "u32");