diff --git a/GNUmakefile b/GNUmakefile
index 9cc2ccdd..78989595 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -39,7 +39,7 @@ CXXSTD  ?= $(eval CXXSTD := $$(shell PROBE=$$$$([ -f mdbx.c++ ] && echo mdbx.c++
 CXXFLAGS = $(CXXSTD) $(filter-out -std=gnu11,$(CFLAGS))
 
 # TIP: Try append '--no-as-needed,-lrt' for ability to built with modern glibc, but then use with the old.
-LIBS    ?= $(shell uname | grep -qi SunOS && echo "-lkstat") $(shell uname | grep -qi -e Darwin -e OpenBSD || echo "-lrt") $(shell uname | grep -qi Windows && echo "-lntdll")
+LIBS    ?= -lm $(shell uname | grep -qi SunOS && echo "-lkstat") $(shell uname | grep -qi -e Darwin -e OpenBSD || echo "-lrt") $(shell uname | grep -qi Windows && echo "-lntdll")
 
 LDFLAGS ?= $(shell $(LD) --help 2>/dev/null | grep -q -- --gc-sections && echo '-Wl,--gc-sections,-z,relro,-O1')$(shell $(LD) --help 2>/dev/null | grep -q -- -dead_strip && echo '-Wl,-dead_strip')
 EXE_LDFLAGS ?= -pthread