diff --git a/Makefile.linux b/Makefile.linux
index ddb3692b..6cd2a949 100644
--- a/Makefile.linux
+++ b/Makefile.linux
@@ -23,10 +23,10 @@ else ifeq ($(shell expr match ${CXXVER} "[5-6]"),1) # gcc 5 - 6
 else ifeq ($(shell expr match ${CXXVER} "[7-9]"),1) # gcc 7 - 9
 	NEEDED_CXXFLAGS += -std=c++17
 	LDLIBS = -latomic
-else ifeq ($(shell expr match ${CXXVER} "10"),2) # gcc 10
+else ifeq ($(shell expr match ${CXXVER} "1[0-2]"),2) # gcc 10-12
 	NEEDED_CXXFLAGS += -std=c++17
 	LDLIBS = -latomic
-else ifeq ($(shell expr match ${CXXVER} "1[1-9]"),2) # gcc 11+
+else ifeq ($(shell expr match ${CXXVER} "1[3-9]"),2) # gcc 13+
 	NEEDED_CXXFLAGS += -std=c++20
 	LDLIBS = -latomic
 else # not supported