diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index f4af981..c025406 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -52,6 +52,6 @@ jobs:
       - name: install rust targets
         run: rustup toolchain install nightly -t aarch64-unknown-linux-gnu -c rust-src --no-self-update
 
-      - name: build example -- glibc size-optimized
+      - name: build example -- glibc size_optimized
         run: cd example && make clean
-          && make LIBC=gnu LINK=dynamic PROFILE=size-optimized CARGO="rustup run nightly cargo" LTO=1
+          && make LIBC=gnu LINK=dynamic PROFILE=size_optimized CARGO="rustup run nightly cargo" LTO=1
diff --git a/Cargo.toml b/Cargo.toml
index dd3d637..5e29900 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@ missing_safety_doc = "allow"
 [package.metadata.docs.rs]
 all-features = true
 
-[profile.size-optimized]
+[profile.size_optimized]
 inherits = "release"
 opt-level = 'z'     # Optimize for size
 lto = true          # Enable link-time optimization
diff --git a/example/Makefile b/example/Makefile
index b238200..c69b9a7 100644
--- a/example/Makefile
+++ b/example/Makefile
@@ -11,8 +11,8 @@ ifeq (,$(filter dynamic static,$(_link_type)))
 endif
 
 _profile := $(if $(PROFILE),$(PROFILE),release)
-ifeq (,$(filter release debug size-optimized,$(_profile)))
-  _profile := $(error "PROFILE has to be set to one of: debug, release, size-optimized")
+ifeq (,$(filter release debug size_optimized,$(_profile)))
+  _profile := $(error "PROFILE has to be set to one of: debug, release, size_optimized")
 endif
 
 ARCH ?= $(shell uname -m)
@@ -43,7 +43,7 @@ _rust_cli_profile := $(if $(filter $(_profile),debug),dev,$(_profile))
 STRIPFLAGS += -s --strip-unneeded -R .comment -R .gnu.version -R .note -R .note.gnu.build-id -R .note.ABI-tag
 STATIC_LINK_LIBS += -lservicepoint_binding_c
 
-size-optimized_CARGOFLAGS += -Zbuild-std="core,std,alloc,proc_macro,panic_abort" \
+size_optimized_CARGOFLAGS += -Zbuild-std="core,std,alloc,proc_macro,panic_abort" \
 	-Zbuild-std-features="panic_immediate_abort"
 CARGOFLAGS += --manifest-path=$(REPO_ROOT)/Cargo.toml \
 	--profile=$(_rust_cli_profile) \
@@ -55,7 +55,7 @@ CARGOFLAGS += --manifest-path=$(REPO_ROOT)/Cargo.toml \
 
 CFLAGS += -Wall -Wextra -pedantic -fwhole-program -fPIE -pie
 _no_debug_cflags := -ffunction-sections -fdata-sections -Wl,--gc-sections
-size-optimized_CFLAGS += -Oz \
+size_optimized_CFLAGS += -Oz \
 	-fwrapv -fomit-frame-pointer -fno-stack-protector\
 	-fno-unroll-loops \
 	-fno-unwind-tables -fno-asynchronous-unwind-tables \
@@ -74,7 +74,7 @@ debug_CFLAGS += -Og
 static_CFLAGS += -static $(STATIC_LINK_LIBS)
 dynamic_CFLAGS += -Wl,-Bstatic $(STATIC_LINK_LIBS) -Wl,-Bdynamic
 
-size-optimized_RUSTFLAGS += -Zlocation-detail=none \
+size_optimized_RUSTFLAGS += -Zlocation-detail=none \
 	-Zfmt-debug=none \
 	-C link-arg=-z,norelro \
 	-C panic=abort
diff --git a/example/target.mk b/example/target.mk
index 12d98b1..2b74f03 100644
--- a/example/target.mk
+++ b/example/target.mk
@@ -45,7 +45,7 @@ help:
 	@echo "Variable | Description          | Default   | Values"
 	@echo "---------+----------------------+-----------+---------------------------"
 	@echo "LIBC     | libc to link against | 'gnu'     | 'gnu' or 'musl'"
-	@echo "PROFILE  | Optimization profile | 'release' | 'debug' or 'size-optimized'"
+	@echo "PROFILE  | Optimization profile | 'release' | 'debug' or 'size_optimized'"
 	@echo "LINK     |                      | 'dynamic' | 'dynamic' or 'static'"
 	@echo "CARGO    | cargo binary to use  | 'cargo'   | 'rustup run nightly cargo'"
 	@echo "CC       | C compiler to use    | 'gcc'     | 'musl-gcc'"